Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2021		31,950,092
Beginning balance at Dec. 31, 2021	$ 1,350,775	$ 316	$ 434,640	$ 930,061	$ (14,242)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	98,737			98,737
Other comprehensive income (loss), net of tax	(196,397)				(196,397)
Stock-based compensation expense	7,587		7,587
Issuance of common stock related to options exercised, net of shares withheld for payroll taxes (in shares)		3,289
Issuance of common stock related to options exercised, net of shares withheld for payroll taxes	97		97
Vesting of time based stock awards issued at date of grant, net of shares withheld for payroll taxes (in shares)		(68,931)
Vesting of time-based stock awards issued at date of grant, net of shares withheld for payroll taxes	0	$ 2	(2)
Vesting of performance-based stock awards, net of shares withheld for payroll taxes (in shares)		21,026
Time based stock awards granted (in shares)		166,471
Issuance of common stock related to employee stock purchase plan (in shares)		10,374
Issuance of common stock related to employee stock purchase plan	558		558
Cash dividends declared	(41,586)			(41,586)
Ending balance (in shares) at Sep. 30, 2022		32,082,321
Ending balance at Sep. 30, 2022	1,219,771	$ 318	442,880	987,212	(210,639)
Beginning balance (in shares) at Jun. 30, 2022		32,081,241
Beginning balance at Jun. 30, 2022	1,252,720	$ 318	440,418	964,353	(152,369)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	37,297			37,297
Other comprehensive income (loss), net of tax	(58,270)				(58,270)
Stock-based compensation expense	2,274		2,274
Issuance of common stock related to options exercised, net of shares withheld for payroll taxes (in shares)		0
Issuance of common stock related to options exercised, net of shares withheld for payroll taxes	0		0
Vesting of time based stock awards issued at date of grant, net of shares withheld for payroll taxes (in shares)		(2,893)
Time based stock awards granted (in shares)		0
Issuance of common stock related to employee stock purchase plan (in shares)		3,973
Issuance of common stock related to employee stock purchase plan	188		188
Cash dividends declared	(14,438)			(14,438)
Ending balance (in shares) at Sep. 30, 2022		32,082,321
Ending balance at Sep. 30, 2022	$ 1,219,771	$ 318	442,880	987,212	(210,639)
Beginning balance (in shares) at Dec. 31, 2022	31,346,903	31,346,903
Beginning balance at Dec. 31, 2022	$ 1,228,321	$ 310	412,303	1,015,215	(199,507)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	80,309			80,309
Other comprehensive income (loss), net of tax	(11,998)				(11,998)
Stock-based compensation expense	7,653		7,653
Vesting of time based stock awards issued at date of grant, net of shares withheld for payroll taxes (in shares)		(59,314)
Vesting of time-based stock awards issued at date of grant, net of shares withheld for payroll taxes	0	$ 1	(1)
Vesting of performance-based stock awards, net of shares withheld for payroll taxes (in shares)		27,296
Time based stock awards granted (in shares)		187,822
Issuance of common stock related to employee stock purchase plan (in shares)		15,275
Issuance of common stock related to employee stock purchase plan	$ 459		459
Cash dividends declared (in shares)	0
Cash dividends declared	$ (40,825)			(40,825)
Common stock repurchased (in shares)		(1,600,000)
Common stock repurchased	$ 48,035	$ 15	48,020
Ending balance (in shares) at Sep. 30, 2023	29,917,982	29,917,982
Ending balance at Sep. 30, 2023	$ 1,215,884	$ 296	372,394	1,054,699	(211,505)
Beginning balance (in shares) at Jun. 30, 2023		29,912,082
Beginning balance at Jun. 30, 2023	1,219,766	$ 296	370,278	1,040,779	(191,587)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	27,383			27,383
Other comprehensive income (loss), net of tax	(19,918)				(19,918)
Stock-based compensation expense	1,969		1,969
Vesting of time based stock awards issued at date of grant, net of shares withheld for payroll taxes (in shares)		(15,250)
Time based stock awards granted (in shares)		14,280
Issuance of common stock related to employee stock purchase plan (in shares)		6,870
Issuance of common stock related to employee stock purchase plan	145		145
Cash dividends declared	(13,463)			(13,463)
Common stock repurchased	$ (2)		(2)
Ending balance (in shares) at Sep. 30, 2023	29,917,982	29,917,982
Ending balance at Sep. 30, 2023	$ 1,215,884	$ 296	$ 372,394	$ 1,054,699	$ (211,505)