Consolidated Condensed Statements Of Changes In Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Preferred Stock [Member]	Preferred Stock [Member] Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock [Member]	Common Stock [Member] Cumulative Effect, Period of Adoption, Adjusted Balance	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury Stock At Cost [Member]	Treasury Stock At Cost [Member] Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (loss) [Member]	Accumulated Other Comprehensive Income (loss) [Member] Cumulative Effect, Period of Adoption, Adjusted Balance
Balance at Dec. 31, 2020		$ (8,000)	$ 0	$ 0	$ 460,687	$ 460,687	$ 704,764		$ 696,808	$ (130,766)	$ (130,766)	$ 5,571	$ 5,571
Balance (Accounting Standards Update 2016-13) at Dec. 31, 2020								$ (7,956)
Net Income							42,831
Other comprehensive income (loss)												(13,472)
Dividends on common shares							(20,365)
Cash payment for fractional shares in dividend reinvestment plan					(1)
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures					(3,988)		(44)			(2,174)
Share-based Payment Arrangement, Expense					1,836
Balance at Mar. 31, 2021			0		458,534		719,230			(128,592)		(7,901)
Balance at Dec. 31, 2020		$ (8,000)	0	$ 0	460,687	$ 460,687	704,764		$ 696,808	(130,766)	$ (130,766)	5,571	$ 5,571
Balance (Accounting Standards Update 2016-13) at Dec. 31, 2020								$ (7,956)
Net Income	$ 81,963
Other comprehensive income (loss)	(8,501)
Share-based Payment Arrangement, Expense	3,300
Balance at Jun. 30, 2021			0		459,276		741,155			(128,109)		(2,930)
Balance at Mar. 31, 2021			0		458,534		719,230			(128,592)		(7,901)
Net Income	39,132						39,132
Other comprehensive income (loss)	4,971											4,971
Dividends on common shares							(17,081)
Cash payment for fractional shares in dividend reinvestment plan					(2)
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures					(743)		(126)			(483)
Share-based Payment Arrangement, Expense	1,500				1,487
Balance at Jun. 30, 2021			0		459,276		741,155			(128,109)		(2,930)
Balance at Dec. 31, 2021	1,110,759		0		461,800		776,294			(142,490)		15,155
Net Income							38,875
Other comprehensive income (loss)												(55,624)
Dividends on common shares							(17,172)
Cash payment for fractional shares in dividend reinvestment plan					(2)
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures					(4,508)		(964)			(3,021)
Share-based Payment Arrangement, Expense					1,981
Balance at Mar. 31, 2022			0		459,271		797,033			(139,469)		(40,469)
Balance at Dec. 31, 2021	1,110,759		0		461,800		776,294			(142,490)		15,155
Net Income	73,199
Other comprehensive income (loss)	(100,559)
Share-based Payment Arrangement, Expense	3,400
Balance at Jun. 30, 2022	1,050,013		0		460,645		814,241			(139,469)		(85,404)
Balance at Mar. 31, 2022			0		459,271		797,033			(139,469)		(40,469)
Net Income	34,324						34,324
Other comprehensive income (loss)	(44,935)											(44,935)
Dividends on common shares							(17,116)
Share-based Payment Arrangement, Expense	1,400				1,374
Balance at Jun. 30, 2022	$ 1,050,013		$ 0		$ 460,645		$ 814,241			$ (139,469)		$ (85,404)