Commitments and Contingencies Operating Leases as Lessee We lease business offices, have entered into site lease agreements and use satellite transponder and fiber capacity and certain equipment pursuant to operating lease arrangements. Many of our leases are for multiple years and contain renewal options. Rental costs under such arrangements amounted to $46.5 million , $37.4 million and $36.3 million for the years ended December 31, 2013, 2012 and 2011, respectively. Capital Leases as Lessee We entered into a long-term capital lease agreement in 1991 with the wife of GCI s President and CEO for property occupied by us as further described in Note 11, Related Party Transactions. We have a capital lease agreement for transponder capacity on Intelsat, Ltd. s ( Intelsat ) Galaxy 18 spacecraft. The Intelsat Galaxy 18 C-band and Ku-Band transponders are being leased over an expected term of 14 years. At lease inception the present value of the lease payments, excluding telemetry, tracking and command services and back-up protection, was $98.6 million . We amended our transponder capacity lease agreement with Intelsat in October 2013 to lease additional transponder capacity on Intelsat's Galaxy 18 spacecraft. As a result, on January 1, 2014 we expect to increase our existing capital lease asset and liability by $9.4 million . A summary of future minimum lease payments follows (amounts in thousands): Years ending December 31: Operating Capital 2014 $ 37,163 11,758 2015 31,358 11,734 2016 27,636 11,745 2017 22,120 11,723 2018 19,996 11,730 2019 and thereafter 66,020 43,297 Total minimum lease payments $ 204,293 101,987 Less amount representing interest 27,381 Less current maturity of obligations under capital leases 6,465 Long-term obligations under capital leases, excluding current maturity $ 68,141 The leases generally provide that we pay the taxes, insurance and maintenance expenses related to the leased assets. Several of our leases include renewal options, escalation clauses and immaterial amounts of contingent rent