Revenue Recognition - Schedule of Changes in Contract Balances Due to Adoption of New Accounting Standards (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Revenue From Contract With Customer [Abstract]
Contract assets	$ 150,390	$ 143,369
Contract liabilities	(35,700)	(42,050)
Net contract assets (liabilities)	114,690	$ 101,319
Change in contract assets	7,021
Change in contract liabilities	6,350
Change in net contract assets (liabilities)	$ 13,371
Percentage of change in contract assets	4.90%
Percentage of change in contract liabilities	(15.10%)
Percentage of change in net contract assets (liabilities)	13.20%