Summary of Significant Accounting Policies - Allowance for Credit Losses and Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Management Fees and Other Revenues
Insurance reserve for insurance subsidiaries and other self-insurance programs	$ 77,200	$ 71,600
Income Taxes
Provision for federal income taxes for REIT entities	0
Deferred Tax Liabilities, Net	259,300	251,100
Cash paid income taxes	$ 102,454	$ 20,046	$ 21,626