Commitments and Contingencies (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Future minimum lease payments due under operating and capital leases
Operating Leases 2017	$ 16,939
Capital Leases 2017	4,731	[1]
Operating Leases 2018	17,063
Capital Leases 2018	4,678	[1]
Operating Leases 2019	17,269
Capital Leases 2019	4,334	[1]
Operating Leases 2020	16,810
Capital Leases 2020	4,173	[1]
Operating Leases 2021	16,647
Capital Leases 2022	4,173	[1]
Operating Leases Thereafter	1,021,264
Capital Leases Thereafter	71,747	[1]
Operating Lease Total	1,105,992
Capital Leases Total	$ 93,836	[1]

[1] Amounts above represent principal and interest obligations under capital lease arrangements. Related assets with a gross value of $167,324,000 and accumulated depreciation of $24,929,000 are recorded in real property.