CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	AOCI	Treasury Stock	Total
Beginning balance at Dec. 31, 2020	$ 56	$ 1,253,360	$ 20,830	$ 33,309	$ (37,486)	$ 1,270,069
Beginning Balance (in shares) at Dec. 31, 2020	54,404,379
Increase (decrease) in shareholders' equity
Net income			67,582			67,582
OCI, net of tax				(22,584)		(22,584)
Stock issued in acquisition, net of stock issuance costs	$ 2	58,982				58,984
Stock issued in acquisition, net of stock issuance costs (in shares)	2,206,237
Repurchase of stock					(7,248)	(7,248)
Repurchase of stock (in shares)	(280,000)
Cash dividends common stock			(24,997)			(24,997)
Stock dividend equivalents RSUs		489	(489)
Stock-based compensation		3,885				3,885
Ending balance at Jun. 30, 2021	$ 58	1,316,716	62,926	10,725	(44,734)	1,345,691
Ending Balance (in shares) at Jun. 30, 2021	56,330,616
Beginning balance at Mar. 31, 2021	$ 56	1,255,044	45,897	3,821	(38,996)	1,265,822
Beginning Balance (in shares) at Mar. 31, 2021	54,345,379
Increase (decrease) in shareholders' equity
Net income			29,766			29,766
OCI, net of tax				6,904		6,904
Stock issued in acquisition, net of stock issuance costs	$ 2	58,982				58,984
Stock issued in acquisition, net of stock issuance costs (in shares)	2,206,237
Repurchase of stock					(5,738)	(5,738)
Repurchase of stock (in shares)	(221,000)
Cash dividends common stock			(12,484)			(12,484)
Stock dividend equivalents RSUs		253	(253)
Stock-based compensation		2,437				2,437
Ending balance at Jun. 30, 2021	$ 58	1,316,716	62,926	10,725	(44,734)	1,345,691
Ending Balance (in shares) at Jun. 30, 2021	56,330,616
Beginning balance at Dec. 31, 2021	$ 58	1,316,984	92,463	(23,758)	(66,635)	1,319,112
Beginning Balance (in shares) at Dec. 31, 2021	55,434,910
Increase (decrease) in shareholders' equity
Net income			58,263			58,263
OCI, net of tax				(187,349)		(187,349)
Repurchase of stock					(6,824)	(6,824)
Repurchase of stock (in shares)	(258,614)
Issuance of treasury stock for ESPP		(194)			1,005	811
Issuance of treasury stock for ESPP (in shares)	39,040
Net issuance of treasury stock for RSU/DSU vesting and related tax		(3,949)			3,100	(849)
Net issuance of treasury stock for RSU/DSU vesting and related tax (in shares)	120,367
Cash dividends common stock			(25,452)			(25,452)
Stock dividend equivalents RSUs		589	(589)
Stock-based compensation		4,245				4,245
Ending balance at Jun. 30, 2022	$ 58	1,317,675	124,685	(211,107)	(69,354)	1,161,957
Ending Balance (in shares) at Jun. 30, 2022	55,335,703
Beginning balance at Mar. 31, 2022	$ 58	1,318,701	107,890	(137,605)	(71,019)	1,218,025
Beginning Balance (in shares) at Mar. 31, 2022	55,278,785
Increase (decrease) in shareholders' equity
Net income			29,824			29,824
OCI, net of tax				(73,502)		(73,502)
Repurchase of stock					(1,604)	(1,604)
Repurchase of stock (in shares)	(70,000)
Issuance of treasury stock for ESPP		(88)			358	270
Issuance of treasury stock for ESPP (in shares)	13,900
Net issuance of treasury stock for RSU/DSU vesting and related tax		(3,590)			2,911	(679)
Net issuance of treasury stock for RSU/DSU vesting and related tax (in shares)	113,018
Cash dividends common stock			(12,713)			(12,713)
Stock dividend equivalents RSUs		316	(316)
Stock-based compensation		2,336				2,336
Ending balance at Jun. 30, 2022	$ 58	$ 1,317,675	$ 124,685	$ (211,107)	$ (69,354)	$ 1,161,957
Ending Balance (in shares) at Jun. 30, 2022	55,335,703