CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - 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			37,816			37,816
OCI, net of tax				(29,488)		(29,488)
Repurchase of stock					(1,510)	(1,510)
Repurchase of stock (in shares)	(59,000)
Cash dividends common stock			(12,513)			(12,513)
Stock dividend equivalents RSUs		236	(236)
Stock-based compensation		1,448				1,448
Ending balance at Mar. 31, 2021	$ 56	1,255,044	45,897	3,821	(38,996)	1,265,822
Ending Balance (in shares) at Mar. 31, 2021	54,345,379
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			28,439			28,439
OCI, net of tax				(113,847)		(113,847)
Repurchase of stock					(5,220)	(5,220)
Repurchase of stock (in shares)	(188,614)
Issuance of treasury stock for ESPP		(106)			647	541
Issuance of treasury stock for ESPP (in shares)	25,140
Net issuance of treasury stock for RSU/DSU vesting and related tax		(359)			189	(170)
Net issuance of treasury stock for RSU/DSU vesting and related tax (in shares)	7,349
Cash dividends common stock			(12,739)			(12,739)
Stock dividend equivalents RSUs		273	(273)
Stock-based compensation		1,909				1,909
Ending balance at Mar. 31, 2022	$ 58	$ 1,318,701	$ 107,890	$ (137,605)	$ (71,019)	$ 1,218,025
Ending Balance (in shares) at Mar. 31, 2022	55,278,785