Revenue Recognition - Schedule of Changes in Contract Balances Due to Adoption of New Accounting Standards (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Revenue From Contract With Customer [Abstract]
Contract assets	$ 164,155	$ 143,369
Contract liabilities	(43,589)	(42,050)
Net contract assets (liabilities)	120,566	$ 101,319
Change in contract assets	20,786
Change in contract liabilities	(1,539)
Change in net contract assets (liabilities)	$ 19,247
Percentage of change in contract assets	14.50%
Percentage of change in contract liabilities	3.70%
Percentage of change in net contract assets (liabilities)	19.00%