Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 1,899,456
Foreign currency translation gain (loss)	(4,260)
Gain on derivative instruments, net of tax of $0.1 million	19
U.K. Sale	375,606
Balance	2,517,489
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(373,101)
Foreign currency translation gain (loss)	(4,293)
U.K. Sale	377,394
Change in Fair Value of Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	13,686
Gain on derivative instruments, net of tax of $0.1 million	19
U.K. Sale	(13,705)
Pension Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(11,950)
Foreign currency translation gain (loss)	33
U.K. Sale	11,917
Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ (371,365)