we do not have any foreign operations and our business is not seasonal . our operations are not dependent on a single tenant or a few tenants and no single tenant accounted for more than 10 % of our total 2018 revenue . during the twelve months ended december 31 , 2018 , we owned and managed properties within five markets : ( 1 ) philadelphia central business district ( “ philadelphia cbd ” ) , ( 2 ) pennsylvania suburbs , ( 3 ) austin , texas , ( 4 ) metropolitan washington , d.c. , and ( 5 ) other . the philadelphia cbd segment includes properties located in the city of philadelphia in pennsylvania . the pennsylvania suburbs segment includes properties in chester , delaware and montgomery counties in the philadelphia suburbs . the austin , texas segment includes properties in the city of austin , texas . the metropolitan washington , d.c. segment includes properties in northern virginia , washington , d.c. and southern maryland . the other segment includes properties in camden county in new jersey and properties in new castle county in delaware . in addition to the five markets , our corporate group is responsible for cash and investment management , development of certain real estate properties during the construction period , and certain other general support functions . we generate cash and revenue from leases of space at our properties and , to a lesser extent , from the management of properties owned by third parties and from investments in the real estate ventures . factors that we evaluate when leasing space include rental rates , costs of tenant improvements , tenant creditworthiness , current and expected operating costs , the length of the lease term , vacancy levels and demand for office and industrial space . we also generate cash through sales of assets , including assets that we do not view as part of our core properties , either because of location or expected growth potential , and assets that are commanding premium prices from third party investors . the following highlights our financial results for the year ended december 31 , 2018 : net income available to common shareholders increased by $ 20.7 million to $ 136.0 million for the year ended december 31 , 2018 , as compared to the corresponding period in 2017. funds from operations available to common share and unit holders ( “ ffo ” ) , a non-gaap financial measure , increased to $ 247.7 million or $ 1.37 per diluted share for the year ended december 31 , 2018 , from $ 229.2 million or $ 1.29 per diluted share for the year ended december 31 , 2017 ( see additional disclosure in the “ funds from operations ( ffo ) ” section below ) . 46 same store net operating income , a non-gaap financial measure , decreased 2.2 % for the year ended december 31 , 2018 , as compared to the corresponding period in 2017 ( see additional disclosure on same store net operating income in “ results of operations ” section below ) . core occupancy increased from 92.9 % at december 31 , 2017 , to 93.3 % at december 31 , 2018. we increased our quarterly dividend from $ 0.18 to $ 0.19 per share for a 5.6 % annualized increase . we used liquidity generated from additional net sales activity to opportunistically repurchase over 1.7 million common shares at a weighted-average price of $ 12.64 per share which is well below our current net asset value . factors that may influence future results of operations global market and economic conditions in the u.s. , market and economic conditions have been improving , characterized by more availability to credit , increasing interest rates and modest growth . while recent economic data reflects modest growth , the cost and availability of credit may be adversely affected by illiquid credit markets and wider credit spreads . volatility in the u.s. and international markets and economies may adversely affect our liquidity and financial condition , and the liquidity and financial condition of our tenants . any adverse market conditions may limit our ability , as well as the ability of our tenants , to timely refinance maturing liabilities and access capital markets to meet liquidity needs . real estate asset valuation general economic conditions and the resulting impact on market conditions or a downturn in tenants ' businesses may adversely affect the value of our assets . challenging economic conditions in the u.s. , declining demand for leased office , retail , or mixed-use properties and or a decrease in market rental rates and or market values of real estate assets in our submarkets could have a negative impact on the value of our properties . if we were required under gaap to write down the carrying value of any of our properties due to impairment , or if as a result of an early lease termination we were required to remove or dispose of material amounts of tenant improvements that are not reusable to another tenant , our financial condition and results of operations could be negatively affected . leasing activity and rental rates the amount of net rental income generated by our properties depends principally on our ability to maintain the occupancy rates of currently leased space and to lease currently available space , newly developed or redeveloped properties and space available from unscheduled lease terminations . the amount of rental income we generate also depends on our ability to maintain or increase rental rates in our submarkets . negative trends in one or more of these factors could adversely affect our rental income in future periods . equity method investment valuation our equity method investments , consisting of our investments in unconsolidated real estate ventures , may be adversely affected by changes in the real estate markets in which they operate . story_separator_special_tag , an office property acquired during the fourth quarter of 2017 the increase of $ 41.8 million in total revenue was offset by an $ 8.3 million decrease due to the disposition of 30 properties during 2017 and 2018 ( the “ 2017 and 2018 dispositions ” ) . straight-line rents decreased by $ 15.4 million from free rent converting to cash rent from 2017 to 2018 , of which $ 11.3 million related to recently completed/acquired properties , primarily the fmc tower , which is located in the philadelphia cbd segment and $ 5.9 million in the same store property portfolio , primarily the philadelphia cbd segment . these decreases were offset by a $ 1.8 million increase from development/redevelopment properties , primarily related to the bulletin building , which was acquired during the fourth quarter of 2017. tenant reimbursements from the total portfolio increased $ 10.0 million from 2017 to 2018 , due to an increase of $ 6.7 million from recently completed/acquired properties due to the expiration of free rent periods for tenants within the fmc tower and the acquisition of the dra austin venture properties , an increase of $ 3.7 million in the same store property portfolio , primarily due to increased operating costs at our philadelphia cbd segment and austin , texas segment , and a $ 1.8 million increase from development/redevelopment properties , relating to the bulletin building , which was acquired during the fourth quarter of 2017. these increases were partially offset by a decrease of $ 2.2 million from the 2017 and 2018 dispositions . termination fees decreased $ 0.6 million from 2017 to 2018 , due to the timing and volume of early tenant move-outs during 2018 when compared to 2017. third party management fees , labor reimbursement and leasing income decreased $ 5.8 million from 2017 to 2018 , due primarily to decreases in third party management and development fees . the decreases include $ 5.2 million of construction management fees related to the subaru headquarters development , which was substantially complete as of december 31 , 2017 , $ 2.9 million of third party management fees relates to the sale of the properties within the austin venture and $ 0.5 million related to the fourth quarter of 2018 sale of three office properties and the third quarter of 2017 sale of one office property held by our bdn – ai venture . these decreases were offset by a $ 2.8 million increase in construction management fees , primarily relating to the map venture . other income at our total portfolio increased by $ 1.9 million from 2017 to 2018 , which was primarily related to restaurant income from walnut street café at the fmc tower , which was placed into service at the end of the second quarter of 2017. property operating expenses property operating expenses across our total portfolio increased $ 3.9 million from 2017 to 2018 , of which $ 7.2 million relates to recently completed/acquired properties , primarily from the fmc tower , which was fully placed into service during the second quarter of 2017 , as well as the twelve properties acquired from the dra austin venture during the fourth quarter of 2018. an additional increase of $ 0.6 million is due to marketing costs relating to business development efforts and costs associated with parking operations , both within our philadelphia cbd segment . development/redevelopment properties increased $ 2.1 million , primarily because of the bulletin building , which was acquired during the fourth quarter of 2017 and immediately placed into redevelopment . the same store portfolio increased $ 2.1 million , primarily related to our philadelphia cbd segment . these increases were partially offset by a $ 4.9 million decrease related to the 2017 and 2018 dispositions , a $ 1.9 million decrease due to the write-off of a prior period straight line rent receivable related to an early termination , $ 0.7 million in salary expense reductions relating from the sale of properties from unconsolidated real estate ventures that we manage and a $ 0.5 million reduction in development salary due to increased capitalization at our development/redevelopment projects . real estate taxes real estate taxes across our total portfolio increased by $ 6.1 million from 2017 to 2018 , of which $ 5.1 million relates to increased real estate tax assessments at the same store property portfolio , primarily in the philadelphia cbd segment , $ 2.1 million related to recently completed/acquired properties and $ 0.5 million related to development/redevelopment properties . these increases were partially offset by decreases of $ 1.6 million from the 2017 and 2018 dispositions . 52 depreciation and amortization depreciation and amortization expense decreased by $ 5.1 million from 2017 to 2018 , of which $ 8.8 million relates to an increase in depreciation expense from recently completed/acquired properties , primarily due to the acquisition of our partner 's 50 % ownership interest in the twelve remaining properties within our dra austin venture during the fourth quarter of 2018 , the office component of fmc tower being fully placed into service during the second quarter of 2017 as well as four tower bridge , which was acquired in january 2018. this increase was offset by a $ 6.3 million decrease relating to the 2017 and 2018 dispositions , a $ 5.9 million decrease to fully amortized intangible assets at the same store property portfolio , which is directly attributable to a reduction in intangible asset amortization related to the broadmoor portfolio , located in our austin , texas segment which was acquired during the second quarter of 2015 , a $ 0.9 decrease from development/redevelopment properties and a $ 0.8 million decrease related to assets in our other segment that were fully depreciated during the third quarter of 2017. general and administrative expenses general and administrative expenses across our total portfolio decreased by $ 0.7 million from 2017 to 2018 , due to a $ 1.6 million

cash flows the following discussion of our cash flows is based on the consolidated statements of cash flows and is not meant to be a comprehensive discussion of the changes in our cash flows for the years presented . as of december 31 , 2018 and 2017 , we maintained cash and cash equivalents and restricted cash of $ 23.2 million and $ 203.4 million , respectively . the following are the changes in cash flow from our activities for the years ended december 31 , 2018 , 2017 and 2016 ( in thousands ) : replace_table_token_20_th our principal source of cash flows is from the operation of our properties . our properties provide a relatively consistent stream of cash flows that provide us with the resources to fund operating expenses , debt service and quarterly dividends . the net increase of $ 44.8 million in cash from operating activities during 2018 compared to 2017 is primarily due to free rent periods ending in our philadelphia cbd segment . the net decrease of $ 294.3 million in cash from investing activities during 2018 compared to 2017 primarily relates to property portfolio repositioning efforts , which occurred during the fourth quarter of 2018. quantitatively , the decrease resulted from the following : $ 175.1 million decrease from the 2018 issuances of a $ 130.7 million note to the dra austin venture used to repay mortgage debt , at closing , related to


 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 the following discussion of our cash flows is based on the consolidated statements of cash flows and is not meant to be a comprehensive discussion of the changes in our cash flows for the years presented . as of december 31 , 2018 and 2017 , we maintained cash and cash equivalents and restricted cash of $ 23.2 million and $ 203.4 million , respectively . the following are the changes in cash flow from our activities for the years ended december 31 , 2018 , 2017 and 2016 ( in thousands ) : replace_table_token_20_th our principal source of cash flows is from the operation of our properties . our properties provide a relatively consistent stream of cash flows that provide us with the resources to fund operating expenses , debt service and quarterly dividends . the net increase of $ 44.8 million in cash from operating activities during 2018 compared to 2017 is primarily due to free rent periods ending in our philadelphia cbd segment . the net decrease of $ 294.3 million in cash from investing activities during 2018 compared to 2017 primarily relates to property portfolio repositioning efforts , which occurred during the fourth quarter of 2018. quantitatively , the decrease resulted from the following : $ 175.1 million decrease from the 2018 issuances of a $ 130.7 million note to the dra austin venture used to repay mortgage debt , at closing , related to
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 Suspicious Activity Report : we do not have any foreign operations and our business is not seasonal . our operations are not dependent on a single tenant or a few tenants and no single tenant accounted for more than 10 % of our total 2018 revenue . during the twelve months ended december 31 , 2018 , we owned and managed properties within five markets : ( 1 ) philadelphia central business district ( “ philadelphia cbd ” ) , ( 2 ) pennsylvania suburbs , ( 3 ) austin , texas , ( 4 ) metropolitan washington , d.c. , and ( 5 ) other . the philadelphia cbd segment includes properties located in the city of philadelphia in pennsylvania . the pennsylvania suburbs segment includes properties in chester , delaware and montgomery counties in the philadelphia suburbs . the austin , texas segment includes properties in the city of austin , texas . the metropolitan washington , d.c. segment includes properties in northern virginia , washington , d.c. and southern maryland . the other segment includes properties in camden county in new jersey and properties in new castle county in delaware . in addition to the five markets , our corporate group is responsible for cash and investment management , development of certain real estate properties during the construction period , and certain other general support functions . we generate cash and revenue from leases of space at our properties and , to a lesser extent , from the management of properties owned by third parties and from investments in the real estate ventures . factors that we evaluate when leasing space include rental rates , costs of tenant improvements , tenant creditworthiness , current and expected operating costs , the length of the lease term , vacancy levels and demand for office and industrial space . we also generate cash through sales of assets , including assets that we do not view as part of our core properties , either because of location or expected growth potential , and assets that are commanding premium prices from third party investors . the following highlights our financial results for the year ended december 31 , 2018 : net income available to common shareholders increased by $ 20.7 million to $ 136.0 million for the year ended december 31 , 2018 , as compared to the corresponding period in 2017. funds from operations available to common share and unit holders ( “ ffo ” ) , a non-gaap financial measure , increased to $ 247.7 million or $ 1.37 per diluted share for the year ended december 31 , 2018 , from $ 229.2 million or $ 1.29 per diluted share for the year ended december 31 , 2017 ( see additional disclosure in the “ funds from operations ( ffo ) ” section below ) . 46 same store net operating income , a non-gaap financial measure , decreased 2.2 % for the year ended december 31 , 2018 , as compared to the corresponding period in 2017 ( see additional disclosure on same store net operating income in “ results of operations ” section below ) . core occupancy increased from 92.9 % at december 31 , 2017 , to 93.3 % at december 31 , 2018. we increased our quarterly dividend from $ 0.18 to $ 0.19 per share for a 5.6 % annualized increase . we used liquidity generated from additional net sales activity to opportunistically repurchase over 1.7 million common shares at a weighted-average price of $ 12.64 per share which is well below our current net asset value . factors that may influence future results of operations global market and economic conditions in the u.s. , market and economic conditions have been improving , characterized by more availability to credit , increasing interest rates and modest growth . while recent economic data reflects modest growth , the cost and availability of credit may be adversely affected by illiquid credit markets and wider credit spreads . volatility in the u.s. and international markets and economies may adversely affect our liquidity and financial condition , and the liquidity and financial condition of our tenants . any adverse market conditions may limit our ability , as well as the ability of our tenants , to timely refinance maturing liabilities and access capital markets to meet liquidity needs . real estate asset valuation general economic conditions and the resulting impact on market conditions or a downturn in tenants ' businesses may adversely affect the value of our assets . challenging economic conditions in the u.s. , declining demand for leased office , retail , or mixed-use properties and or a decrease in market rental rates and or market values of real estate assets in our submarkets could have a negative impact on the value of our properties . if we were required under gaap to write down the carrying value of any of our properties due to impairment , or if as a result of an early lease termination we were required to remove or dispose of material amounts of tenant improvements that are not reusable to another tenant , our financial condition and results of operations could be negatively affected . leasing activity and rental rates the amount of net rental income generated by our properties depends principally on our ability to maintain the occupancy rates of currently leased space and to lease currently available space , newly developed or redeveloped properties and space available from unscheduled lease terminations . the amount of rental income we generate also depends on our ability to maintain or increase rental rates in our submarkets . negative trends in one or more of these factors could adversely affect our rental income in future periods . equity method investment valuation our equity method investments , consisting of our investments in unconsolidated real estate ventures , may be adversely affected by changes in the real estate markets in which they operate . story_separator_special_tag , an office property acquired during the fourth quarter of 2017 the increase of $ 41.8 million in total revenue was offset by an $ 8.3 million decrease due to the disposition of 30 properties during 2017 and 2018 ( the “ 2017 and 2018 dispositions ” ) . straight-line rents decreased by $ 15.4 million from free rent converting to cash rent from 2017 to 2018 , of which $ 11.3 million related to recently completed/acquired properties , primarily the fmc tower , which is located in the philadelphia cbd segment and $ 5.9 million in the same store property portfolio , primarily the philadelphia cbd segment . these decreases were offset by a $ 1.8 million increase from development/redevelopment properties , primarily related to the bulletin building , which was acquired during the fourth quarter of 2017. tenant reimbursements from the total portfolio increased $ 10.0 million from 2017 to 2018 , due to an increase of $ 6.7 million from recently completed/acquired properties due to the expiration of free rent periods for tenants within the fmc tower and the acquisition of the dra austin venture properties , an increase of $ 3.7 million in the same store property portfolio , primarily due to increased operating costs at our philadelphia cbd segment and austin , texas segment , and a $ 1.8 million increase from development/redevelopment properties , relating to the bulletin building , which was acquired during the fourth quarter of 2017. these increases were partially offset by a decrease of $ 2.2 million from the 2017 and 2018 dispositions . termination fees decreased $ 0.6 million from 2017 to 2018 , due to the timing and volume of early tenant move-outs during 2018 when compared to 2017. third party management fees , labor reimbursement and leasing income decreased $ 5.8 million from 2017 to 2018 , due primarily to decreases in third party management and development fees . the decreases include $ 5.2 million of construction management fees related to the subaru headquarters development , which was substantially complete as of december 31 , 2017 , $ 2.9 million of third party management fees relates to the sale of the properties within the austin venture and $ 0.5 million related to the fourth quarter of 2018 sale of three office properties and the third quarter of 2017 sale of one office property held by our bdn – ai venture . these decreases were offset by a $ 2.8 million increase in construction management fees , primarily relating to the map venture . other income at our total portfolio increased by $ 1.9 million from 2017 to 2018 , which was primarily related to restaurant income from walnut street café at the fmc tower , which was placed into service at the end of the second quarter of 2017. property operating expenses property operating expenses across our total portfolio increased $ 3.9 million from 2017 to 2018 , of which $ 7.2 million relates to recently completed/acquired properties , primarily from the fmc tower , which was fully placed into service during the second quarter of 2017 , as well as the twelve properties acquired from the dra austin venture during the fourth quarter of 2018. an additional increase of $ 0.6 million is due to marketing costs relating to business development efforts and costs associated with parking operations , both within our philadelphia cbd segment . development/redevelopment properties increased $ 2.1 million , primarily because of the bulletin building , which was acquired during the fourth quarter of 2017 and immediately placed into redevelopment . the same store portfolio increased $ 2.1 million , primarily related to our philadelphia cbd segment . these increases were partially offset by a $ 4.9 million decrease related to the 2017 and 2018 dispositions , a $ 1.9 million decrease due to the write-off of a prior period straight line rent receivable related to an early termination , $ 0.7 million in salary expense reductions relating from the sale of properties from unconsolidated real estate ventures that we manage and a $ 0.5 million reduction in development salary due to increased capitalization at our development/redevelopment projects . real estate taxes real estate taxes across our total portfolio increased by $ 6.1 million from 2017 to 2018 , of which $ 5.1 million relates to increased real estate tax assessments at the same store property portfolio , primarily in the philadelphia cbd segment , $ 2.1 million related to recently completed/acquired properties and $ 0.5 million related to development/redevelopment properties . these increases were partially offset by decreases of $ 1.6 million from the 2017 and 2018 dispositions . 52 depreciation and amortization depreciation and amortization expense decreased by $ 5.1 million from 2017 to 2018 , of which $ 8.8 million relates to an increase in depreciation expense from recently completed/acquired properties , primarily due to the acquisition of our partner 's 50 % ownership interest in the twelve remaining properties within our dra austin venture during the fourth quarter of 2018 , the office component of fmc tower being fully placed into service during the second quarter of 2017 as well as four tower bridge , which was acquired in january 2018. this increase was offset by a $ 6.3 million decrease relating to the 2017 and 2018 dispositions , a $ 5.9 million decrease to fully amortized intangible assets at the same store property portfolio , which is directly attributable to a reduction in intangible asset amortization related to the broadmoor portfolio , located in our austin , texas segment which was acquired during the second quarter of 2015 , a $ 0.9 decrease from development/redevelopment properties and a $ 0.8 million decrease related to assets in our other segment that were fully depreciated during the third quarter of 2017. general and administrative expenses general and administrative expenses across our total portfolio decreased by $ 0.7 million from 2017 to 2018 , due to a $ 1.6 million

