Commitments and Contingencies (Details 2) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Future minimum lease payments under the Company's current leases
2018	$ 22,124
2019	22,139
2020	19,858
2021	21,242
2022	21,139
Thereafter	1,096,784
Operating Lease Obligations
2018	21,051
2019	21,064
2020	18,781
2021	20,162
2022	20,057
Thereafter	1,052,808
Capital lease obligations
2018	1,073
2019	1,075
2020	1,077
2021	1,080
2022	1,082
Thereafter	43,976
Imputed interest on capital leases	25,961
Capital Leased Assets, Gross	$ 19,737	$ 39,015