Intangible Assets and Liabilities Estimated Future Annual Amortization Expense (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Intangible Assets [Abstract]
2020 (amount remaining at June 30, 2020)	$ 26,345
2021	37,479
2022	27,138
2023	19,605
2024	15,469
Thereafter	31,089
Total intangible assets subject to amortization (accretion)	157,125
2020 (amount remaining at June 30, 2020)	(4,013)
2021	(1,963)
2022	(459)
2023	0
2024	0
Thereafter	0
Intangible liabilities, Net	(6,435)	$ (10,450)
2020 (amount remaining at June 30, 2020)	22,332
2021	35,516
2022	26,679
2023	19,605
2024	15,469
Thereafter	31,089
Total intangible assets (liabilities), net	$ 150,690