we began operating as a reit for federal income tax purposes effective january 1 , 2012 . 29 the following table details the number of communications sites we own or operate in the countries in which we operate as of december 31 , 2012 : replace_table_token_8_th ( 1 ) all of the sites we operate are held pursuant to long-term capital leases , including those subject to purchase options . the majority of our tenant leases with wireless carriers are typically for an initial non-cancellable term of five to ten years , with multiple five-year renewal terms thereafter . accordingly , nearly all of the revenue generated by our rental and management operations during the year ended december 31 , 2012 is recurring revenue that we should continue to receive in future periods . based upon foreign currency exchange rates and the tenant leases in place as of december 31 , 2012 , we expect to generate approximately $ 20 billion of non-cancellable tenant lease revenue over future periods , excluding the impact of straight-line lease accounting . in addition , most of our tenant leases have provisions that periodically increase the rent due under the lease , typically annually based on a fixed percentage ( on average approximately 3.5 % in the united states ) , inflation , or inflation with a fixed minimum or maximum escalation for the year . revenue generated by rent increases based on fixed escalation clauses is recognized on a straight line basis over the non-cancellable term of the applicable agreement . we also routinely seek to extend our leases with our tenants , which increases the non-cancellable term of the lease and creates incremental growth in our revenues . the revenues generated by our rental and management operations may also be affected by cancellations of existing tenant leases . as discussed above , most of our tenant leases with wireless carriers and broadcasters are multi-year contracts , which typically are non-cancellable ; however in some instances , a lease may be cancelled upon the payment of a termination fee . revenue lost from either cancellations of leases at the end of their terms or rent negotiations historically have not had a material adverse effect on the revenues generated by our rental and management operations . during the year ended december 31 , 2012 , loss of annual revenue from tenant lease cancellations or renegotiations represented less than 1.3 % of our rental and management operations revenues . rental and management operations revenue growth . the primary factors affecting the revenue growth for our domestic and international rental and management segments are : recurring revenues from tenant leases generated from sites which existed in our portfolio as of the beginning of the prior year period ( legacy sites ) ; contractual rent escalations on existing tenant leases , net of cancellations ; new revenue generated from leasing additional space on our legacy sites ; and new revenue generated from new sites acquired or constructed since the beginning of the prior year period ( new sites ) . 30 we continue to believe that our site leasing revenue is likely to increase due to the growing use of wireless communications services and our ability to meet that demand by adding new tenants and new equipment for existing tenants on our legacy sites , which increases the utilization and profitability of our sites . in addition , we believe the majority of our site leasing activity will continue to come from wireless service providers . our legacy site portfolio and our established tenant base provide us with new business opportunities , which have historically resulted in consistent and predictable organic revenue growth as wireless carriers seek to increase the coverage and capacity of their networks as well as roll out next generation wireless technologies . in addition , we intend to continue to supplement the organic growth on our legacy sites by selectively developing or acquiring new sites in our existing and new markets where we can achieve our risk adjusted return on investment criteria . rental and management operations organic revenue growth . consistent with our strategy to increase the utilization and return on investment of our legacy sites , our objective is to add new tenants and new equipment for existing tenants through collocation . our ability to lease additional space on our sites is primarily a function of the rate at which wireless carriers deploy capital to improve and expand their wireless networks . this rate , in turn , is influenced by the growth of wireless communications services and related infrastructure needs , the financial performance of our tenants and their access to capital , and general economic conditions . the following key trends within each market that we serve provide opportunities for organic revenue growth : domestic . as a result of the rapid subscriber adoption of wireless data applications , wireless service providers in the united states continue to invest in their wireless networks by adding new cell sites as well as additional equipment to their existing cell sites . this level of wireless communications services growth has driven wireless providers in the united states to deploy consistent levels of annual wireless capital investment and as a result , we have experienced strong demand for our communications sites . we expect the following key industry trends will result in incremental revenue opportunities for us : the deployment of advanced wireless technology across existing wireless networks will provide higher speed data services and enable fixed broadband substitution . as a result , our tenants continue to deploy additional equipment across their existing networks . wireless service providers compete based on the overall capacity and coverage of their existing wireless networks . to maintain or improve their network performance as overall network usage increases , our tenants continue to deploy additional equipment across their existing sites as well as add new cell sites . story_separator_special_tag the growth was primarily attributable to the increase in network development services segment gross margin and the decrease in sg & a , as described above . depreciation , amortization and accretion year ended december 31 , amount of increase ( decrease ) percent increase ( decrease ) 2012 2011 depreciation , amortization and accretion $ 644,276 $ 555,517 $ 88,759 16 % 36 depreciation , amortization and accretion for the year ended december 31 , 2012 increased 16 % to $ 644.3 million . the increase was primarily attributable to the depreciation , amortization and accretion associated with the acquisition or construction of approximately 19,280 sites since january 1 , 2011 , which resulted in an increase in property and equipment . other operating expenses year ended december 31 , amount of increase ( decrease ) percent increase ( decrease ) 2012 2011 other operating expenses $ 62,185 $ 58,103 $ 4,082 7 % other operating expenses for the year ended december 31 , 2012 increased 7 % to $ 62.2 million . this change was primarily attributable to an increase of approximately $ 17.0 million in impairment charges and loss on disposal of assets , which included an impairment charge of $ 10.8 million of one of our outdoor das networks , upon the termination of a tenant lease during the year ended december 31 , 2012. this increase was partially offset by a decrease of approximately $ 12.9 million in acquisition related costs and non-recurring consulting and legal costs incurred in 2011 associated with our reit conversion . interest expense year ended december 31 , amount of increase ( decrease ) percent increase ( decrease ) 2012 2011 interest expense $ 401,665 $ 311,854 $ 89,811 29 % interest expense for the year ended december 31 , 2012 increased 29 % to $ 401.7 million . the increase was primarily attributable to an increase in our average debt outstanding of approximately $ 1,617.3 million , which was primarily used to fund our recent acquisitions , and an increase in our annualized weighted average cost of borrowing from 5.32 % to 5.37 % . other expense year ended december 31 , amount of increase ( decrease ) percent increase ( decrease ) 2012 2011 other expense $ 38,300 $ 122,975 $ ( 84,675 ) ( 69 ) % other expense for the year ended december 31 , 2012 decreased 69 % to $ 38.3 million . the decrease was primarily a result of a decline in unrealized currency losses of $ 96.8 million . during the year ended december 31 , 2012 , we recorded unrealized foreign currency losses of approximately $ 34.3 million resulting primarily from fluctuations in the foreign currency exchange rates associated with our intercompany notes and similar unaffiliated balances denominated in a currency other than the subsidiaries ' functional currencies and other expenses of approximately $ 4.0 million . during the year ended december 31 , 2011 , we recorded unrealized foreign currency losses of approximately $ 131.1 million and other miscellaneous income of $ 8.1 million . income tax provision replace_table_token_14_th 37 the income tax provision for the year ended december 31 , 2012 decreased 14 % to $ 107.3 million . the effective tax rate ( etr ) for the year ended december 31 , 2012 decreased to 15.3 % from 24.7 % . this decrease was primarily attributable to our dividend paid deduction and decreased state taxes during the year ended december 31 , 2012 , partially offset by an increase in foreign taxes and valuation allowance on certain deferred tax assets . the deferred tax assets arose primarily as a result of purchase accounting and existing nols , which were generated partly from interest on intercompany debt . as a reit , we may deduct earnings distributed to stockholders against the income generated in our qrss and , in addition , we are able to offset income in both our trss and qrss by utilizing our nols , subject to specified limitations . the etr on income from continuing operations for the years ended december 31 , 2012 and 2011 differs from the federal statutory rate primarily due to our expected qualification for taxation as a reit effective as of january 1 , 2012 and to adjustments for foreign items . net income/adjusted ebitda replace_table_token_15_th net income for the year ended december 31 , 2012 increased 56 % to $ 594.0 million . the increase was primarily attributable to an increase in our rental and management segments operating profit , as described above , as well as decreases in unrealized foreign currency losses and income tax provision , partially offset by increases in depreciation , amortization and accretion and interest expense . adjusted ebitda for the year ended december 31 , 2012 increased 19 % to $ 1,892.4 million . adjusted ebitda growth was primarily attributable to the increase in our rental and management segments gross margin , and was partially offset by an increase in sg & a . years ended december 31 , 2011 and 2010 ( in thousands , except percentages ) revenue replace_table_token_16_th 38 total revenues for the year ended december 31 , 2011 increased 23 % to $ 2,443.5 million . the increase was primarily attributable to an increase in both of our rental and management segments , including organic revenue growth attributable to our legacy sites and revenue growth attributable to the approximately 18,290 new communications sites , and property interests that we lease to communications service providers and third-party tower operators under approximately 1,810 communications sites , acquired since january 1 , 2010. domestic rental and management segment revenue for the year ended december 31 , 2011 increased 11 % to $ 1,744.3 million . this growth was comprised of : approximately 9 % from organic revenue growth , which was due to the incremental revenue generated from adding new tenants to legacy sites , existing tenants adding more equipment to legacy sites

cash flows from investing activities for the year ended december 31 , 2012 , cash used for investing activities was $ 2,558.4 million , a decrease of approximately $ 232.4 million , as compared to the year ended december 31 , 2011. this decrease was primarily attributable to a decrease in acquisition-related activity during the year ended december 31 , 2012. during the year ended december 31 , 2012 , payments for purchases of property and equipment and construction activities totaled $ 568.0 million , including $ 279.0 million of capital expenditures for discretionary capital projects , such as completion of the construction of approximately 2,360 communications sites and the installation of approximately 600 shared generators domestically , $ 82.3 million spent to acquire land under our towers that was subject to ground agreements ( including leases ) , $ 120.0 million of capital expenditures related to capital improvements and corporate capital expenditures primarily attributable to information technology improvements and $ 86.7 million for the redevelopment of existing sites to accommodate new tenant equipment . in addition , during the year ended december 31 , 2012 , we spent $ 1,998.0 million to acquire approximately 6,450 communications sites in our served markets , approximately 24 property interests under third-party communications sites in the united states and for the payment of amounts previously recognized in accounts payable or accrued expenses in the consolidated balance sheets for communications sites we acquired in chile , colombia , ghana and south africa during the year ended december 31 , 2011. for the year ended december 31 , 2011 , cash used for investing activities was $ 2,790.8 million , an increase of approximately $ 1,489.9 million , as compared to the year ended december 31 , 2010. this increase was primarily comprised of increased spending for acquisitions during the year ended december 31 , 2011. during the year ended december 31 , 2011 , payments for purchases of property and equipment and construction activities totaled $ 523.0 million , including $ 296.9 million of capital expenditures for discretionary capital projects , such as completion of the construction of approximately 1,850 communications sites , $ 91.3 million spent to acquire land under our towers that was subject to ground


 Write a concise suspicious activity report of the following text delimited by triple backquotes. Return your response as a formal report which covers the key points highlighting the location,dates,entity names and account holder information in chronological order of the text.
     ```cash flows from investing activities for the year ended december 31 , 2012 , cash used for investing activities was $ 2,558.4 million , a decrease of approximately $ 232.4 million , as compared to the year ended december 31 , 2011. this decrease was primarily attributable to a decrease in acquisition-related activity during the year ended december 31 , 2012. during the year ended december 31 , 2012 , payments for purchases of property and equipment and construction activities totaled $ 568.0 million , including $ 279.0 million of capital expenditures for discretionary capital projects , such as completion of the construction of approximately 2,360 communications sites and the installation of approximately 600 shared generators domestically , $ 82.3 million spent to acquire land under our towers that was subject to ground agreements ( including leases ) , $ 120.0 million of capital expenditures related to capital improvements and corporate capital expenditures primarily attributable to information technology improvements and $ 86.7 million for the redevelopment of existing sites to accommodate new tenant equipment . in addition , during the year ended december 31 , 2012 , we spent $ 1,998.0 million to acquire approximately 6,450 communications sites in our served markets , approximately 24 property interests under third-party communications sites in the united states and for the payment of amounts previously recognized in accounts payable or accrued expenses in the consolidated balance sheets for communications sites we acquired in chile , colombia , ghana and south africa during the year ended december 31 , 2011. for the year ended december 31 , 2011 , cash used for investing activities was $ 2,790.8 million , an increase of approximately $ 1,489.9 million , as compared to the year ended december 31 , 2010. this increase was primarily comprised of increased spending for acquisitions during the year ended december 31 , 2011. during the year ended december 31 , 2011 , payments for purchases of property and equipment and construction activities totaled $ 523.0 million , including $ 296.9 million of capital expenditures for discretionary capital projects , such as completion of the construction of approximately 1,850 communications sites , $ 91.3 million spent to acquire land under our towers that was subject to ground
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 Suspicious Activity Report : we began operating as a reit for federal income tax purposes effective january 1 , 2012 . 29 the following table details the number of communications sites we own or operate in the countries in which we operate as of december 31 , 2012 : replace_table_token_8_th ( 1 ) all of the sites we operate are held pursuant to long-term capital leases , including those subject to purchase options . the majority of our tenant leases with wireless carriers are typically for an initial non-cancellable term of five to ten years , with multiple five-year renewal terms thereafter . accordingly , nearly all of the revenue generated by our rental and management operations during the year ended december 31 , 2012 is recurring revenue that we should continue to receive in future periods . based upon foreign currency exchange rates and the tenant leases in place as of december 31 , 2012 , we expect to generate approximately $ 20 billion of non-cancellable tenant lease revenue over future periods , excluding the impact of straight-line lease accounting . in addition , most of our tenant leases have provisions that periodically increase the rent due under the lease , typically annually based on a fixed percentage ( on average approximately 3.5 % in the united states ) , inflation , or inflation with a fixed minimum or maximum escalation for the year . revenue generated by rent increases based on fixed escalation clauses is recognized on a straight line basis over the non-cancellable term of the applicable agreement . we also routinely seek to extend our leases with our tenants , which increases the non-cancellable term of the lease and creates incremental growth in our revenues . the revenues generated by our rental and management operations may also be affected by cancellations of existing tenant leases . as discussed above , most of our tenant leases with wireless carriers and broadcasters are multi-year contracts , which typically are non-cancellable ; however in some instances , a lease may be cancelled upon the payment of a termination fee . revenue lost from either cancellations of leases at the end of their terms or rent negotiations historically have not had a material adverse effect on the revenues generated by our rental and management operations . during the year ended december 31 , 2012 , loss of annual revenue from tenant lease cancellations or renegotiations represented less than 1.3 % of our rental and management operations revenues . rental and management operations revenue growth . the primary factors affecting the revenue growth for our domestic and international rental and management segments are : recurring revenues from tenant leases generated from sites which existed in our portfolio as of the beginning of the prior year period ( legacy sites ) ; contractual rent escalations on existing tenant leases , net of cancellations ; new revenue generated from leasing additional space on our legacy sites ; and new revenue generated from new sites acquired or constructed since the beginning of the prior year period ( new sites ) . 30 we continue to believe that our site leasing revenue is likely to increase due to the growing use of wireless communications services and our ability to meet that demand by adding new tenants and new equipment for existing tenants on our legacy sites , which increases the utilization and profitability of our sites . in addition , we believe the majority of our site leasing activity will continue to come from wireless service providers . our legacy site portfolio and our established tenant base provide us with new business opportunities , which have historically resulted in consistent and predictable organic revenue growth as wireless carriers seek to increase the coverage and capacity of their networks as well as roll out next generation wireless technologies . in addition , we intend to continue to supplement the organic growth on our legacy sites by selectively developing or acquiring new sites in our existing and new markets where we can achieve our risk adjusted return on investment criteria . rental and management operations organic revenue growth . consistent with our strategy to increase the utilization and return on investment of our legacy sites , our objective is to add new tenants and new equipment for existing tenants through collocation . our ability to lease additional space on our sites is primarily a function of the rate at which wireless carriers deploy capital to improve and expand their wireless networks . this rate , in turn , is influenced by the growth of wireless communications services and related infrastructure needs , the financial performance of our tenants and their access to capital , and general economic conditions . the following key trends within each market that we serve provide opportunities for organic revenue growth : domestic . as a result of the rapid subscriber adoption of wireless data applications , wireless service providers in the united states continue to invest in their wireless networks by adding new cell sites as well as additional equipment to their existing cell sites . this level of wireless communications services growth has driven wireless providers in the united states to deploy consistent levels of annual wireless capital investment and as a result , we have experienced strong demand for our communications sites . we expect the following key industry trends will result in incremental revenue opportunities for us : the deployment of advanced wireless technology across existing wireless networks will provide higher speed data services and enable fixed broadband substitution . as a result , our tenants continue to deploy additional equipment across their existing networks . wireless service providers compete based on the overall capacity and coverage of their existing wireless networks . to maintain or improve their network performance as overall network usage increases , our tenants continue to deploy additional equipment across their existing sites as well as add new cell sites . story_separator_special_tag the growth was primarily attributable to the increase in network development services segment gross margin and the decrease in sg & a , as described above . depreciation , amortization and accretion year ended december 31 , amount of increase ( decrease ) percent increase ( decrease ) 2012 2011 depreciation , amortization and accretion $ 644,276 $ 555,517 $ 88,759 16 % 36 depreciation , amortization and accretion for the year ended december 31 , 2012 increased 16 % to $ 644.3 million . the increase was primarily attributable to the depreciation , amortization and accretion associated with the acquisition or construction of approximately 19,280 sites since january 1 , 2011 , which resulted in an increase in property and equipment . other operating expenses year ended december 31 , amount of increase ( decrease ) percent increase ( decrease ) 2012 2011 other operating expenses $ 62,185 $ 58,103 $ 4,082 7 % other operating expenses for the year ended december 31 , 2012 increased 7 % to $ 62.2 million . this change was primarily attributable to an increase of approximately $ 17.0 million in impairment charges and loss on disposal of assets , which included an impairment charge of $ 10.8 million of one of our outdoor das networks , upon the termination of a tenant lease during the year ended december 31 , 2012. this increase was partially offset by a decrease of approximately $ 12.9 million in acquisition related costs and non-recurring consulting and legal costs incurred in 2011 associated with our reit conversion . interest expense year ended december 31 , amount of increase ( decrease ) percent increase ( decrease ) 2012 2011 interest expense $ 401,665 $ 311,854 $ 89,811 29 % interest expense for the year ended december 31 , 2012 increased 29 % to $ 401.7 million . the increase was primarily attributable to an increase in our average debt outstanding of approximately $ 1,617.3 million , which was primarily used to fund our recent acquisitions , and an increase in our annualized weighted average cost of borrowing from 5.32 % to 5.37 % . other expense year ended december 31 , amount of increase ( decrease ) percent increase ( decrease ) 2012 2011 other expense $ 38,300 $ 122,975 $ ( 84,675 ) ( 69 ) % other expense for the year ended december 31 , 2012 decreased 69 % to $ 38.3 million . the decrease was primarily a result of a decline in unrealized currency losses of $ 96.8 million . during the year ended december 31 , 2012 , we recorded unrealized foreign currency losses of approximately $ 34.3 million resulting primarily from fluctuations in the foreign currency exchange rates associated with our intercompany notes and similar unaffiliated balances denominated in a currency other than the subsidiaries ' functional currencies and other expenses of approximately $ 4.0 million . during the year ended december 31 , 2011 , we recorded unrealized foreign currency losses of approximately $ 131.1 million and other miscellaneous income of $ 8.1 million . income tax provision replace_table_token_14_th 37 the income tax provision for the year ended december 31 , 2012 decreased 14 % to $ 107.3 million . the effective tax rate ( etr ) for the year ended december 31 , 2012 decreased to 15.3 % from 24.7 % . this decrease was primarily attributable to our dividend paid deduction and decreased state taxes during the year ended december 31 , 2012 , partially offset by an increase in foreign taxes and valuation allowance on certain deferred tax assets . the deferred tax assets arose primarily as a result of purchase accounting and existing nols , which were generated partly from interest on intercompany debt . as a reit , we may deduct earnings distributed to stockholders against the income generated in our qrss and , in addition , we are able to offset income in both our trss and qrss by utilizing our nols , subject to specified limitations . the etr on income from continuing operations for the years ended december 31 , 2012 and 2011 differs from the federal statutory rate primarily due to our expected qualification for taxation as a reit effective as of january 1 , 2012 and to adjustments for foreign items . net income/adjusted ebitda replace_table_token_15_th net income for the year ended december 31 , 2012 increased 56 % to $ 594.0 million . the increase was primarily attributable to an increase in our rental and management segments operating profit , as described above , as well as decreases in unrealized foreign currency losses and income tax provision , partially offset by increases in depreciation , amortization and accretion and interest expense . adjusted ebitda for the year ended december 31 , 2012 increased 19 % to $ 1,892.4 million . adjusted ebitda growth was primarily attributable to the increase in our rental and management segments gross margin , and was partially offset by an increase in sg & a . years ended december 31 , 2011 and 2010 ( in thousands , except percentages ) revenue replace_table_token_16_th 38 total revenues for the year ended december 31 , 2011 increased 23 % to $ 2,443.5 million . the increase was primarily attributable to an increase in both of our rental and management segments , including organic revenue growth attributable to our legacy sites and revenue growth attributable to the approximately 18,290 new communications sites , and property interests that we lease to communications service providers and third-party tower operators under approximately 1,810 communications sites , acquired since january 1 , 2010. domestic rental and management segment revenue for the year ended december 31 , 2011 increased 11 % to $ 1,744.3 million . this growth was comprised of : approximately 9 % from organic revenue growth , which was due to the incremental revenue generated from adding new tenants to legacy sites , existing tenants adding more equipment to legacy sites

