Stockholders' Equity - Schedule of Changes in Stockholders' Equity (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Balance	$ 803,470	$ 746,961
Net income	17,862	18,351
Other comprehensive income (loss)	2,659	2,780
Equity compensation	3,563	3,275
Exercise of stock options	92	87
Net payments for stock issuances and buybacks	(21,716)	(17,580)
Dividends declared	(2,628)	(2,641)
Balance	$ 803,302	$ 751,233
Common Stock
Balance (in shares)	18,876	18,910
Balance	$ 23	$ 23
Exercise of stock options (in shares)		3
Issuance of shares pursuant to vesting of restricted stock units (in shares)	144	153
Net payments for stock issuances and buybacks (in shares)	(227)	(207)
Balance (in shares)	18,793	18,859
Balance	$ 23	$ 23
Additional Paid-in Capital
Balance	384,984	369,058
Equity compensation	3,563	3,275
Exercise of stock options	92	87
Balance	388,639	372,420
Retained Earnings
Balance	649,298	588,731
Net income	17,862	18,351
Dividends declared	(2,628)	(2,641)
Balance	$ 664,532	$ 604,441
Treasury Stock
Balance (in shares)	4,659	4,395
Balance	$ (219,800)	$ (196,745)
Net payments for stock issuances and buybacks (in shares)	227	207
Net payments for stock issuances and buybacks	$ (21,716)	$ (17,580)
Balance (in shares)	4,886	4,602
Balance	$ (241,516)	$ (214,325)
Accumulated Other Comprehensive Loss
Balance	(11,035)	(14,106)
Other comprehensive income (loss)	2,659	2,780
Balance	$ (8,376)	$ (11,326)