Commitments and Contingencies (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Finance lease, cost			$ 2,200
Interest on financing leases	$ 808	$ 0	1,612	$ 0
Finance lease, right-of-use asset, amortization			600
Operating lease rent	$ 8,298	$ 8,846	$ 16,596	$ 17,154
Operating lease, weighted average discount rate, percent	8.46%		8.46%
Operating lease, weighted average remaining lease term	67 years		67 years
Financing leases
Remaining 2019	$ 1,218		$ 1,218
2020	2,619		2,619
2021	2,794		2,794
2022	2,794		2,794
2023	2,794		2,794
2024	2,819		2,819
Thereafter	814,283		814,283
Total minimum lease payments	829,321		829,321
Amount representing interest	(785,287)		(785,287)
Lease liabilities	44,034		44,034		$ 43,616
Operating leases (1)
Remaining 2019	15,576		15,576
2020	31,508		31,508
2021	31,702		31,702
2022	29,548		29,548
2023	27,243		27,243
2024	27,263		27,263
Thereafter	649,289		649,289
Total minimum lease payments	812,129		812,129
Amount discounted using incremental borrowing rate	(424,527)		(424,527)
Lease liabilities	387,602		387,602		$ 3,603
Total minimum sublease rentals to be received	$ 1,700,000		$ 1,700,000
Minimum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, term of contract	3 years		3 years
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, term of contract	95 years		95 years