Leases - Undiscounted Cash Flows on an Annual Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Operating
2019	$ 10,981
2020	22,336
2021	22,531
2022	22,494
2023	22,520
Thereafter	217,489
Total	318,351
Present value adjustments	(87,535)
Lease liabilities	230,816	$ 0
Finance
2019	116
2020	232
2021	237
2022	255
2023	255
Thereafter	16,777
Total	17,872
Present value adjustments	(13,064)
Lease liabilities	4,808
Total
2019	11,097
2020	22,568
2021	22,768
2022	22,749
2023	22,775
Thereafter	234,266
Total	336,223
Present value adjustments	(100,599)
Lease liabilities	$ 235,624