Summary of Significant Accounting Policies Lessee, Lease Liability, Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating Leases [Line Items]
2019 (1)	$ 3,134
2020	6,272
2021	6,201
2022	5,257
2023	2,000
2024	2,061
Thereafter	36,579
Total future minimum lease payments	61,504
Imputed interest	(25,839)
Lease liabilities related to operating right-of-use assets (1)	35,665		$ 0
2019	530
2020	1,073
2021	1,095
2022	1,117
2023	1,139
2024	1,162
Thereafter	15,977
Total future minimum lease payments	22,093
Imputed interest	(6,455)
Finance lease liability	15,638		$ 15,704
Other Liabilities [Member]
Operating Leases [Line Items]
Lease liabilities related to operating right-of-use assets (1)	35,700	$ 37,900
Finance lease liability	$ 15,600