Leases - Operating Lease Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Operating Lease Liabilities, Payments Due [Abstract]
2019 (excluding the three months ended March 31, 2019)	$ 2,455
2020	3,320
2021	4,805
2022	3,940
2023	3,997
Thereafter	763,074
Total lease payments	781,591
Less imputed interest	(679,790)
Total lease liabilities	$ 101,801
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2019		$ 5,232
2020		4,866
2021		6,132
2022		5,122
2023		5,096
Thereafter		636,770
Total		$ 663,218