Stockholders' Equity - Schedule of Changes in Stockholders' Equity (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Balance	$ 803,302	$ 751,233	$ 803,470	$ 746,961
Net income	18,397	20,312	36,259	38,663
Other comprehensive (loss) income, net of tax	(4,211)	432	(1,552)	3,212
Equity compensation	2,944	2,888	6,507	6,163
Exercise of stock options	102	71	194	158
Issuance of shares pursuant to employee stock purchase plan and vesting of restricted stock units	1,539		1,539	1,243
Payments for stock buybacks	(50)	(785)	(21,766)	(19,608)
Dividends declared	(2,606)	(2,640)	(5,234)	(5,281)
Balance	$ 819,417	$ 771,511	$ 819,417	$ 771,511
Common Stock
Balance (in shares)	18,793	18,859	18,876	18,910
Balance	$ 23	$ 23	$ 23	$ 23
Exercise of stock options (in shares)	4	3	8	6
Issuance of shares pursuant to vesting of restricted stock units (in shares)	22	20	162	173
Payments for buybacks (in shares)	(1)	(22)	(228)	(229)
Balance (in shares)	18,818	18,860	18,818	18,860
Balance	$ 23	$ 23	$ 23	$ 23
Additional Paid-in Capital
Balance	388,639	372,420	384,984	369,058
Equity compensation	2,944	2,888	6,507	6,163
Exercise of stock options	102	71	194	158
Issuance of shares pursuant to employee stock purchase plan and vesting of restricted stock units	1,539	1,243	1,539	1,243
Balance	393,224	376,622	393,224	376,622
Retained Earnings
Balance	664,532	604,441	649,298	588,731
Net income	18,397	20,312	36,259	38,663
Dividends declared	(2,606)	(2,640)	(5,234)	(5,281)
Balance	$ 680,323	$ 622,113	$ 680,323	$ 622,113
Treasury Stock
Balance (in shares)	4,886	4,602	4,659	4,395
Balance	$ (241,516)	$ (214,325)	$ (219,800)	$ (196,745)
Payments for buybacks (in shares)	1	22	228	229
Payments for stock buybacks	$ (50)	$ (2,028)	$ (21,766)	$ (19,608)
Balance (in shares)	4,887	4,624	4,887	4,624
Balance	$ (241,566)	$ (216,353)	$ (241,566)	$ (216,353)
Accumulated Other Comprehensive Loss
Balance	(8,376)	(11,326)	(11,035)	(14,106)
Other comprehensive (loss) income, net of tax	(4,211)	432	(1,552)	3,212
Balance	$ (12,587)	$ (10,894)	$ (12,587)	$ (10,894)