Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 13,806	$ 12,547	$ 24,725	$ 55,494
Net change in cash flow derivative hedges—net of tax	[1]	(1,211)	879	1,079	(2,807)
Comprehensive income		$ 12,595	$ 13,426	$ 25,804	$ 52,687

[1] Net of income tax benefit of $409 and $296 for the three months ended September 30, 2021 and 2020 respectively.  Net of income tax provision of $(364) and $(959) for the nine months ended September 30, 2021 and 2020 respectively.