Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Deferred Compensation, Share-Based Payments [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance, (in shares) at Dec. 31, 2022	26,913
Balance, at Dec. 31, 2022	$ 475,086	$ 35	$ (256,105)	$ 383,094	$ 602,110
Net income				80,699	80,699
Other comprehensive loss			4,062		4,062
Stock based compensation	$ 678				678
Stock awarded to employees (in shares)	0
Stock awarded to employees	$ 47				47
Dividends				(22,495)	(22,495)
Restricted stock activity (in shares)	9
Restricted stock activity	$ 508				508
Retirement of common stock (in shares)	(274)
Retirement of common stock	$ (4,844)			(8,903)	(13,747)
Balance, (in shares) at Jun. 30, 2023	26,648
Balance, at Jun. 30, 2023	$ 471,475	35	(252,043)	432,395	651,862
Balance, (in shares) at Mar. 31, 2023	26,648
Balance, at Mar. 31, 2023	$ 471,124	35	(231,573)	403,339	642,925
Net income				40,248	40,248
Other comprehensive loss			(20,470)		(20,470)
Stock based compensation	$ 339				339
Stock awarded to employees (in shares)	0
Stock awarded to employees	$ 12				12
Dividends				(11,192)	(11,192)
Balance, (in shares) at Jun. 30, 2023	26,648
Balance, at Jun. 30, 2023	$ 471,475	35	(252,043)	432,395	651,862
Balance, (in shares) at Dec. 31, 2023	26,671
Balance, at Dec. 31, 2023	$ 473,136	35	(190,282)	490,005	772,894
Net income				71,879	71,879
Other comprehensive loss			(7,018)		(7,018)
Exercise of stock options (in shares)	5
Exercise of stock options	$ 203				203
Stock based compensation	$ 773				773
Stock awarded to employees (in shares)	0
Stock awarded to employees	$ 48				48
Dividends				(23,474)	(23,474)
Restricted stock activity (in shares)	11
Restricted stock activity	$ 505				505
Retirement of common stock (in shares)	(4)
Retirement of common stock	$ (82)			(128)	(210)
Balance, (in shares) at Jun. 30, 2024	26,683
Balance, at Jun. 30, 2024	$ 474,583	35	(197,300)	538,282	815,600
Balance, (in shares) at Mar. 31, 2024	26,678
Balance, at Mar. 31, 2024	$ 473,954	35	(196,857)	514,559	791,691
Net income				35,462	35,462
Other comprehensive loss			(443)		(443)
Exercise of stock options (in shares)	5
Exercise of stock options	$ 203				203
Stock based compensation	$ 409				409
Stock awarded to employees (in shares)	0
Stock awarded to employees	$ 17				17
Dividends				(11,739)	(11,739)
Balance, (in shares) at Jun. 30, 2024	26,683
Balance, at Jun. 30, 2024	$ 474,583	$ 35	$ (197,300)	$ 538,282	$ 815,600