Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid In Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2019			33,241,496
Beginning balance at Dec. 31, 2019	$ 1,190,681	$ (10,931)	$ 331	$ 482,286	$ 705,105	$ (10,931)	$ 2,959
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	132,217				132,217
Other comprehensive loss, net of tax	12,541						12,541
Stock-based compensation expense	5,324			5,324
Issuance of common stock related to options exercised, net of shares withheld for payroll taxes (in shares)			3,300
Issuance of common stock related to options exercised, net of shares withheld for payroll taxes	63			63
Vesting of time based stock awards issued at date of grant, net of shares withheld for payroll taxes (in shares)			(28,811)
Vesting of time based stock awards issued at date of grant, net of shares withheld for payroll taxes	(1)			(1)
Vesting of performance based stock awards, net of shares withheld for payroll taxes (in shares)			4,126
Time based stock awards granted (in shares)			176,252
Issuance of common stock related to employee stock purchase plan (in shares)			24,210
Issuance of common stock related to employee stock purchase plan	760			760
Cash dividends declared	(28,330)				(28,330)
Common stock repurchased (in shares)			(1,640,910)
Common stock repurchased	(61,432)		$ (16)	(61,416)
Ending balance (in shares) at Dec. 31, 2020			31,779,663
Ending balance at Dec. 31, 2020	$ 1,240,892		$ 315	427,016	798,061		15,500
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Cash Paid	$ 0.88
Net Income	$ 176,691				176,691
Other comprehensive loss, net of tax	(29,742)						(29,742)
Stock-based compensation expense	7,811			7,811
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)			(24,429)
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)			15,686
Time based stock awards granted (in shares)			179,624
Issuance of common stock related to employee stock purchase plan (in shares)			12,723
Issuance of common stock related to employee stock purchase plan	496			496
Cash dividends declared	(44,691)				(44,691)
Common stock repurchased (in shares)			(13,175)
Common stock repurchased	$ (682)		$ 0	(682)
Ending balance (in shares) at Dec. 31, 2021	31,950,092		31,950,092
Ending balance at Dec. 31, 2021	$ 1,350,775		$ 316	434,640	930,061		(14,242)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Cash Paid	$ 1.40
Net Income	$ 140,930				140,930
Other comprehensive loss, net of tax	(185,265)						(185,265)
Stock-based compensation expense	9,899			9,899
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
Vesting of time based stock awards issued at date of grant, net of shares withheld for payroll taxes (in shares)			(70,286)
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)			14,611
Issuance of common stock related to employee stock purchase plan	748			748
Cash dividends declared	(55,776)				(55,776)
Common stock repurchased (in shares)			(738,300)
Common stock repurchased	$ (33,087)		$ (8)	(33,079)
Ending balance (in shares) at Dec. 31, 2022	31,346,903		31,346,903
Ending balance at Dec. 31, 2022	$ 1,228,321		$ 310	$ 412,303	$ 1,015,215		$ (199,507)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Cash Paid	$ 1.75