Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Performance Shares [Member] Preferred Stock [Member]	Performance Shares [Member] Common Stock [Member]	Performance Shares [Member] Additional Paid-in Capital [Member]	Performance Shares [Member] Retained Earnings [Member]	Performance Shares [Member] Treasury Stock, Common [Member]	Performance Shares [Member] AOCI Attributable to Parent [Member]	Performance Shares [Member]	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock, Common [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Dec. 31, 2021								$ 110,927	$ 586,946	$ 27,246	$ 440,169	$ (39,672)	$ (1,404)	$ 1,124,212
Net income								0	0	0	92,654	0	0	92,654
Other comprehensive income (loss), net of tax								0	0	0	0	0	(35,088)	(35,088)
Cash dividends paid on preferred stock											(4,527)			(4,527)
Cash dividends paid on common stock								0	0	0	(17,339)	0	0	(17,339)
Exercise of stock options								0	0	124	0	0	0	124
Net shares issued in satisfaction of units earned	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	0	0	0	0	0	0	0
Restricted stock grants, net of forfeitures								0	0	0	0	0	0	0
Repurchase of stock								0	0	0	0	(13,127)	0	(13,127)
Stock-based compensation expense								0	0	3,519	0	0	0	3,519
Balance at Sep. 30, 2022								110,927	586,946	28,756	510,957	(52,799)	(36,492)	1,148,295
Stock grants								0	0	0	0	0	0	0
Share redemption for tax withholdings on performance units and deferred stock units earned								0	0	(2,133)	0	0	0	(2,133)
Balance at Jun. 30, 2022								110,927	586,946	27,536	489,640	(52,799)	(19,103)	1,143,147
Net income								0	0	0	28,915	0	0	28,915
Other comprehensive income (loss), net of tax								0	0	0	0	0	(17,389)	(17,389)
Cash dividends paid on preferred stock											(1,509)			(1,509)
Cash dividends paid on common stock								0	0	0	(6,089)	0	0	(6,089)
Stock-based compensation expense								0	0	1,220	0	0	0	1,220
Balance at Sep. 30, 2022								110,927	586,946	28,756	510,957	(52,799)	(36,492)	1,148,295
Balance at Dec. 31, 2022								110,927	586,946	30,126	535,915	(52,799)	(32,364)	1,178,751
Net income								0	0	0	67,730	0	0	67,730
Other comprehensive income (loss), net of tax								0	0	0	0	0	(21,050)	(21,050)
Cash dividends paid on preferred stock								0	0	0	(4,527)	0	0	(4,527)
Cash dividends paid on common stock								0	0	0	(19,342)	0	0	(19,342)
Exercise of stock options								0	0	96	0	0	0	96
Net shares issued in satisfaction of units earned	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	0	0	0	0	0	0	0
Restricted stock grants, net of forfeitures								0	0	0	0	0	0	0
Repurchase of stock								0	0	0	0	(15,309)	0	(15,309)
Stock-based compensation expense								0	0	3,641	0	0	0	3,641
Balance at Sep. 30, 2023								110,927	586,946	32,027	579,776	(68,108)	(53,414)	1,188,154
Stock grants								0	0	0	0	0	0	0
Share redemption for tax withholdings on performance units and deferred stock units earned								0	0	(1,836)	0	0	0	(1,836)
Balance at Jun. 30, 2023								110,927	586,946	30,740	566,498	(61,877)	(33,837)	1,199,397
Net income								0	0	0	21,407	0	0	21,407
Other comprehensive income (loss), net of tax								0	0	0	0	0	(19,577)	(19,577)
Cash dividends paid on preferred stock								0	0	0	(1,509)	0	0	(1,509)
Cash dividends paid on common stock								0	0	0	(6,620)	0	0	(6,620)
Exercise of stock options								0	0	11	0	0	0	11
Net shares issued in satisfaction of units earned								0	0	0	0	0	0	0
Restricted stock grants, net of forfeitures								0	0	0	0	0	0	0
Repurchase of stock								0	0	0	0	(6,231)	0	(6,231)
Stock-based compensation expense								0	0	1,276	0	0	0	1,276
Balance at Sep. 30, 2023								$ 110,927	$ 586,946	$ 32,027	$ 579,776	$ (68,108)	$ (53,414)	$ 1,188,154