Leases - Maturities of Operating and Financing Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Finance Leases
Remainder of 2019	$ 39,157
2020	89,159
2021	87,525
2022	85,177
2023	84,253
Thereafter	513,206
Total lease payments	898,477
Less: amount representing interest	(309,900)
Present value of lease liabilities	588,577	$ 596,638
Operating Leases
Remainder of 2019	4,828
2020	10,245
2021	8,528
2022	8,090
2023	8,005
Thereafter	45,729
Total lease payments	85,425
Less: amount representing interest	(17,051)
Present value of lease liabilities	68,374
Total
Remainder of 2019	43,985
2020	99,404
2021	96,053
2022	93,267
2023	92,258
Thereafter	558,935
Total lease payments	983,902
Less: amount representing interest	(326,951)
Present value of lease liabilities	$ 656,951