Income Taxes - Reconciliation of Differences between Income Tax Provision and Income Tax Determined by Applying US Federal Statutory Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Amount [Abstract]
U.S. Federal statutory taxes	$ 39,838	$ 37,141	$ 49,671
State and local taxes, net of U.S. Federal benefit	8,412	7,716	5,110
Permanent items	1,266	470	576
Excess tax benefits from vesting or settlement of stock compensation awards	(3,540)	(2,368)	(1,454)
Domestic production activities deduction			(4,376)
Federal credits	(654)	(662)	(534)
Other	(358)	(8)	(2,202)
Total income tax provision	$ 44,964	$ 42,289	$ 46,791