Income Taxes - Schedule of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Current:
Federal	$ 4,566	$ 9,628	$ 23,219	$ 26,100
State and local	8,176	1,865	15,003	5,215
Foreign	3,571	3,385	10,759	9,429
Total current provision	16,313	14,878	48,981	40,744
Deferred:
Federal	2,974	(1,231)	6,354	195
State and local	547	(214)	1,165	4
Foreign	355	(97)	1,124	(105)
Total deferred provision	3,876	(1,542)	8,643	94
Provision for income taxes	$ 20,189	$ 13,336	$ 57,624	$ 40,838
Effective tax rate	23.00%	19.80%	20.30%	20.90%