Income Taxes Changes in Balance of Deferred Tax Asset Valuation Allowance (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Asset Valuation Allowance [Roll Forward]
Beginning Balance	$ (1,326,204)	$ (1,148,268)	$ (1,213,750)
Additions	(61,470)	(182,325)	(24,986)
Deductions	111,369	4,389	90,468
Ending Balance	$ (1,276,305)	$ (1,326,204)	$ (1,148,268)