Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Ownership interest in subsidiaries (as a percent)	100.00%
Total assets	$ 8,687,319	$ 9,033,967	$ 7,177,079
Liabilities	6,584,529	6,528,089
Loss on asset impairment	$ 55,756	39,296	$ 0
Buildings and Improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	40 years
Personal Property | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	12 years
Consolidated
Property, Plant and Equipment [Line Items]
Total assets	$ 118,862	31,920
Liabilities	$ 70,240	$ 138,708