Summary of Significant Accounting Policies Lessee, Lease Liability, Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating Leases [Line Items]
2020	$ 5,999
2021	3,348
2022	3,064
2023	2,000
2024	2,061
Thereafter	36,580
Total future minimum lease payments	53,052
Imputed interest	(24,576)
Lease liabilities related to operating right-of-use assets (1)	28,476		$ 0
Other Liabilities [Member]
Operating Leases [Line Items]
Lease liabilities related to operating right-of-use assets (1)	$ 28,500	$ 37,900