Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Series A 3% Preferred Stock [Member]	Series B-1 8.48% Preferred Stock [Member]	Preferred Equity [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member] Series A 3% Preferred Stock [Member]	Retained Earnings [Member] Series B-1 8.48% Preferred Stock [Member]	Accumulated Other Comprehensive income [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2021	$ 505,142			$ 17,292	$ 161	$ 126,105	$ 384,007			$ (13,207)	$ (9,216)
Comprehensive income (loss):
Net Income (Loss)	14,983						14,983
Other comprehensive income (loss), net of tax	(53,887)									(53,887)
Purchases of common stock for treasury	(15,026)										(15,026)
Share-based compensation plans:
Share-based compensation	443					443
Restricted stock units released						(667)					667
Cash dividends declared:
Preferred stock dividends per share		$ (1)	$ (364)					$ (1)	$ (364)
Common stock dividends per share	(4,444)						(4,444)
Balance at Mar. 31, 2022	446,846			17,292	161	125,881	394,181			(67,094)	(23,575)
Balance at Dec. 31, 2021	505,142			17,292	161	126,105	384,007			(13,207)	(9,216)
Comprehensive income (loss):
Net Income (Loss)	44,485
Other comprehensive income (loss), net of tax	(127,976)									(127,976)
Balance at Sep. 30, 2022	394,048			17,292	161	126,230	414,062			(141,183)	(22,514)
Balance at Mar. 31, 2022	446,846			17,292	161	125,881	394,181			(67,094)	(23,575)
Comprehensive income (loss):
Net Income (Loss)	15,648						15,648
Other comprehensive income (loss), net of tax	(32,631)									(32,631)
Purchases of common stock for treasury	(301)										(301)
Share-based compensation plans:
Share-based compensation	947					947
Restricted stock units released						(917)					917
Restricted stock awards issued						(332)					332
Stock awards	102					(11)					113
Cash dividends declared:
Preferred stock dividends per share		(1)	(363)					(1)	(363)
Common stock dividends per share	(4,446)						(4,446)
Balance at Jun. 30, 2022	425,801			17,292	161	125,568	405,019			(99,725)	(22,514)
Comprehensive income (loss):
Net Income (Loss)	13,854						13,854
Other comprehensive income (loss), net of tax	(41,458)									(41,458)
Share-based compensation plans:
Share-based compensation	662					662
Cash dividends declared:
Preferred stock dividends per share		(1)	(365)					(1)	(365)
Common stock dividends per share	(4,445)						(4,445)
Balance at Sep. 30, 2022	394,048			17,292	161	126,230	414,062			(141,183)	(22,514)
Balance at Dec. 31, 2022	405,605			17,292	161	126,636	421,340			(137,487)	(22,337)
Comprehensive income (loss):
Net Income (Loss)	12,089						12,089
Other comprehensive income (loss), net of tax	10,115									10,115
Purchases of common stock for treasury	(561)										(561)
Share-based compensation plans:
Share-based compensation	551					551
Restricted stock units released						(1,711)					1,711
Cash dividends declared:
Preferred stock dividends per share		(1)	(364)					(1)	(364)
Common stock dividends per share	(4,611)						(4,611)
Balance at Mar. 31, 2023	422,823			17,292	161	125,476	428,453			(127,372)	(21,187)
Balance at Dec. 31, 2022	405,605			17,292	161	126,636	421,340			(137,487)	(22,337)
Comprehensive income (loss):
Net Income (Loss)	40,484
Other comprehensive income (loss), net of tax	(23,902)									(23,902)
Balance at Sep. 30, 2023	408,716			17,292	161	126,178	446,890			(161,389)	(20,416)
Balance at Mar. 31, 2023	422,823			17,292	161	125,476	428,453			(127,372)	(21,187)
Comprehensive income (loss):
Net Income (Loss)	14,373						14,373
Other comprehensive income (loss), net of tax	(7,100)									(7,100)
Purchases of common stock for treasury	(2)										(2)
Share-based compensation plans:
Share-based compensation	657					657
Restricted stock units released						(9)					9
Restricted stock awards issued						(590)					590
Stock awards	97					(77)					174
Cash dividends declared:
Preferred stock dividends per share		(1)	(363)					(1)	(363)
Common stock dividends per share	(4,611)						(4,611)
Balance at Jun. 30, 2023	425,873			17,292	161	125,457	437,851			(134,472)	(20,416)
Comprehensive income (loss):
Net Income (Loss)	14,022						14,022
Other comprehensive income (loss), net of tax	(26,917)									(26,917)
Share-based compensation plans:
Share-based compensation	721					721
Cash dividends declared:
Preferred stock dividends per share		$ (1)	$ (364)					$ (1)	$ (364)
Common stock dividends per share	(4,618)						(4,618)
Balance at Sep. 30, 2023	$ 408,716			$ 17,292	$ 161	$ 126,178	$ 446,890			$ (161,389)	$ (20,416)