Securities - Schedule of Amortized Cost and Fair Value of Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Marketable Securities [Line Items]
Available for Sale, Amortized Cost	$ 332,484	$ 440,358
Available for Sale, Gross Unrealized Gains	2,101	2,890
Available for Sale, Gross Unrealized Losses	(3,171)	(4,660)
Available for Sale	331,414	438,588
Held to Maturity, Amortized Cost	10,969,342	12,365,308
Held to Maturity, Gross Unrealized Gains	6,899	3,995
Held to Maturity, Gross Unrealized Losses	(1,012,181)	(1,384,705)
Held to Maturity	9,964,060	10,984,598
Corporate Debt Securities [Member]
Marketable Securities [Line Items]
Available for Sale, Amortized Cost	14,350	20,698
Available for Sale, Gross Unrealized Gains	1,982	1,827
Available for Sale, Gross Unrealized Losses	(50)	(738)
Available for Sale	16,282	21,787
Held to Maturity, Amortized Cost	12,000	12,000
Held to Maturity, Gross Unrealized Losses	(3,600)	(4,200)
Held to Maturity	8,400	7,800
Collateralized Mortgage Obligations [Member]
Marketable Securities [Line Items]
Available for Sale, Amortized Cost	208,902	321,881
Available for Sale, Gross Unrealized Gains	22	967
Available for Sale, Gross Unrealized Losses	(2,125)	(2,804)
Available for Sale	206,799	320,044
Held to Maturity, Amortized Cost	240,087	263,250
Held to Maturity, Gross Unrealized Gains	425
Held to Maturity, Gross Unrealized Losses	(14,323)	(20,864)
Held to Maturity	226,189	242,386
Mortgage-backed Securities [Member]
Marketable Securities [Line Items]
Available for Sale, Amortized Cost	109,232	97,779
Available for Sale, Gross Unrealized Gains	97	96
Available for Sale, Gross Unrealized Losses	(996)	(1,118)
Available for Sale	108,333	96,757
Held to Maturity, Amortized Cost	10,615,788	11,965,930
Held to Maturity, Gross Unrealized Gains	5,721	2,131
Held to Maturity, Gross Unrealized Losses	(992,286)	(1,357,283)
Held to Maturity	9,629,223	10,610,778
U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member]
Marketable Securities [Line Items]
Held to Maturity, Amortized Cost	7,810	7,631
Held to Maturity, Gross Unrealized Gains	17
Held to Maturity, Gross Unrealized Losses	(3)	(52)
Held to Maturity	7,824	7,579
States and Political Subdivisions [Member]
Marketable Securities [Line Items]
Held to Maturity, Amortized Cost	93,657	116,497
Held to Maturity, Gross Unrealized Gains	736	1,864
Held to Maturity, Gross Unrealized Losses	(1,969)	(2,306)
Held to Maturity	$ 92,424	$ 116,055

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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