Schedule II - Schedule of Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Valuation And Qualifying Accounts [Abstract]
Balance at Beginning of Year	$ 66,131	$ 16,397	$ 18,852
Additions, Charged Against Operations	50,893	57,285	2,525
Deductions, Net Recoveries/Write-offs	(7,221)	(7,551)	(4,980)
Balance at End of Year	$ 109,803	$ 66,131	$ 16,397