Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for Doubtful Accounts Receivable [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 4,298	$ 2,325	$ 919
Additions, Charge to Costs and Expenses	919	2,311	1,127
Additions, Other	56		1,162
Deductions From Reserves	(2,406)	(338)	(883)
Balance at End of Year	2,867	4,298	2,325
Valuation Allowances for Deferred Tax Assets [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	16,576	7,634	3,123
Additions, Charge to Costs and Expenses	6,822	9,036	1,005
Additions, Other			3,506
Deductions From Reserves	(519)	(94)
Balance at End of Year	$ 22,879	$ 16,576	$ 7,634