Schedule II - Schedule of Valuation and Qualifying Accounts (Parenthetical) (Detail) - USD ($) $ in Thousands		12 Months Ended
	Jan. 08, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2020
Increase in real estate impairment reserves			$ 19,000	$ 21,000
Equity investment impairments reserve related to disposals		$ 6,000
Increase in accounts receivable and other reserves		8,000	23,900	22,000
Decrease in accounts receivable and other reserves		38,700
Increase (decrease) in valuation allowances			800
Tax valuation allowances recorded as part of purchase price allocation		7,340	22,944
Cumulative effect of change in accounting principle			8,399
Valuation allowances recorded as part of the purchase price allocation of the Circle Transaction	$ 14,500
Increase (decrease) in real estate impairment reserves related to disposals		(22,400)	(40,500)	(7,200)
Credit loss recovery related to loan paydowns		1,900	2,900
Increase in credit loss reserves on financing-type receivables		41,700	3,300
Priory Group [Member]
Tax valuation allowances recorded as part of purchase price allocation		7,300
Accounting Standards Update 2016-13
Cumulative effect of change in accounting principle					$ 8,400
Valuation Allowance, Deferred Tax Asset [Member]
Increase (decrease) in valuation allowances		$ 20,000	$ 11,900	$ 7,900