Intangible Assets and Liabilities Estimated Future Annual Amortization Expense (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Intangible Assets [Abstract]
2020 (amount remaining at March 31, 2020)	$ 39,618
2021	37,572
2022	27,212
2023	19,674
2024	15,523
Thereafter	31,211
Total intangible assets subject to amortization (accretion)	170,810
2020 (amount remaining at March 31, 2020)	(6,020)
2021	(1,963)
2022	(459)
2023	0
2024	0
Thereafter	0
Intangible liabilities, Net	(8,442)	$ (10,450)
2020 (amount remaining at March 31, 2020)	33,598
2021	35,609
2022	26,753
2023	19,674
2024	15,523
Thereafter	31,211
Total intangible assets (liabilities), net	$ 162,368