Commitments and Contingencies (Details) $ in Thousands	Dec. 31, 2015 USD ($)
Future minimum lease payments due under operating and capital leases
Operating Leases 2016	$ 15,543
Capital Leases 2016	4,732	[1]
Operating Leases 2017	15,624
Capital Leases 2017	4,732	[1]
Operating Leases 2018	15,691
Capital Leases 2018	4,679	[1]
Operating Leases 2019	15,665
Capital Leases 2019	4,333	[1]
Operating Leases 2020	14,928
Capital Leases 2020	4,173	[1]
Operating Leases Thereafter	912,576
Capital Leases Thereafter	75,920	[1]
Operating Lease Total	990,027
Capital Leases Total	$ 98,569	[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 $20,555,000 are recorded in real property.