Shareholders' Equity - AOCI Components Pre Post & Tax Effect (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other Comprehensive Income (Loss), Before Tax:
Net Unrealized Gains (Losses) Arising During the Period	$ 47,860	$ 17,692	$ (523,221)
Loss on Sale		4,582
Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities	24,844	26,909	10,680
Net Unrealized Gains (Losses) on Investment Securities	72,704	49,183	(512,541)
Net Actuarial Gains (Losses) Arising During the Period	(1,101)	1,968	9,525
Amortization of Net Actuarial Losses (Gains)	1,163	751	2,175
Amortization of Prior Service Credit	(246)	(246)	(246)
Defined Benefit Plans, Net	(184)	2,473	11,454
Other Comprehensive Income (Loss)	72,520	51,656	(501,087)
Other Comprehensive Income (Loss), Tax Effect:
Net Unrealized Gains (Losses) Arising During the Period	12,683	4,661	(138,678)
Loss on Sale		1,237
Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities	6,586	7,133	2,831
Net Unrealized Gains (Losses) on Investment Securities	19,269	13,031	(135,847)
Net Actuarial Gains (Losses) Arising During the Period	(291)	521	2,525
Net Actuarial (Gains) Losses Arising During the Period	308	199	576
Amortization of Prior Service Credit	(65)	(65)	(65)
Defined Benefit Plans, Net	(48)	655	3,036
Other Comprehensive Income (Loss)	19,221	13,686	(132,811)
Other Comprehensive Income (Loss), Net of Tax:
Net Unrealized Gains (Losses) Arising During the Period	35,177	13,031	(384,543)
Loss on Sale		3,345
Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities	18,258	19,776	7,849
Net Unrealized Gains (Losses) on Investment Securities	53,435	36,152	(376,694)
Net Actuarial Gains (Losses) Arising During the Period	(810)	1,447	7,000
Amortization of Net Actuarial Losses (Gains)	855	552	1,599
Amortization of Prior Service Credit	(181)	(181)	(181)
Defined Benefit Plans, Net	(136)	1,818	8,418
Other Comprehensive Income (Loss)	$ 53,299	$ 37,970	$ (368,276)

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