Securities - Schedule of Amortized Cost and Fair Value of Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Marketable Securities [Line Items]
Available for Sale, Amortized Cost	$ 337,219	$ 339,016
Available for Sale, Gross Unrealized Gains	2,354	2,157
Available for Sale, Gross Unrealized Losses	(3,728)	(4,213)
Available for Sale	335,845	336,960
Held to Maturity, Amortized Cost	10,456,886	10,757,464
Held to Maturity, Gross Unrealized Gains	3,590	600
Held to Maturity, Gross Unrealized Losses	(1,157,872)	(1,375,585)
Held to Maturity	9,302,604	9,382,479
Corporate Debt Securities [Member]
Marketable Securities [Line Items]
Available for Sale, Amortized Cost	13,650	14,350
Available for Sale, Gross Unrealized Gains	2,297	2,035
Available for Sale, Gross Unrealized Losses		(60)
Available for Sale	15,947	16,325
Held to Maturity, Amortized Cost	12,000	12,000
Held to Maturity, Gross Unrealized Losses	(3,360)	(3,840)
Held to Maturity	8,640	8,160
Collateralized Mortgage Obligations [Member]
Marketable Securities [Line Items]
Available for Sale, Amortized Cost	215,807	216,142
Available for Sale, Gross Unrealized Gains	1	81
Available for Sale, Gross Unrealized Losses	(2,816)	(3,233)
Available for Sale	212,992	212,990
Held to Maturity, Amortized Cost	237,409	232,345
Held to Maturity, Gross Unrealized Gains	9
Held to Maturity, Gross Unrealized Losses	(16,898)	(24,128)
Held to Maturity	220,520	208,217
Mortgage-backed Securities [Member]
Marketable Securities [Line Items]
Available for Sale, Amortized Cost	107,762	108,524
Available for Sale, Gross Unrealized Gains	56	41
Available for Sale, Gross Unrealized Losses	(912)	(920)
Available for Sale	106,906	107,645
Held to Maturity, Amortized Cost	10,118,786	10,409,133
Held to Maturity, Gross Unrealized Gains	3,299	380
Held to Maturity, Gross Unrealized Losses	(1,135,330)	(1,345,063)
Held to Maturity	8,986,755	9,064,450
U.S. Government Agencies [Member]
Marketable Securities [Line Items]
Held to Maturity, Amortized Cost	5,903	5,861
Held to Maturity, Gross Unrealized Losses	(22)	(44)
Held to Maturity	5,881	5,817
States and Political Subdivisions [Member]
Marketable Securities [Line Items]
Held to Maturity, Amortized Cost	82,788	98,125
Held to Maturity, Gross Unrealized Gains	282	220
Held to Maturity, Gross Unrealized Losses	(2,262)	(2,510)
Held to Maturity	$ 80,808	$ 95,835

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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