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Securities - Schedule of Amortized Cost and Fair Value of Investment Securities (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Marketable Securities [Line Items]    
Available for Sale, Amortized Cost $ 343,765 $ 339,016
Available for Sale, Gross Unrealized Gains 2,962 2,157
Available for Sale, Gross Unrealized Losses (4,619) (4,213)
Available for Sale 342,108 336,960
Held to Maturity, Amortized Cost 10,265,996 10,757,464
Held to Maturity, Gross Unrealized Gains 5,012 600
Held to Maturity, Gross Unrealized Losses (1,114,984) (1,375,585)
Held to Maturity 9,156,024 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 2,903 2,035
Available for Sale, Gross Unrealized Losses   (60)
Available for Sale 16,553 16,325
Held to Maturity, Amortized Cost 12,000 12,000
Held to Maturity, Gross Unrealized Losses (2,520) (3,840)
Held to Maturity 9,480 8,160
Collateralized Mortgage Obligations [Member]    
Marketable Securities [Line Items]    
Available for Sale, Amortized Cost 222,874 216,142
Available for Sale, Gross Unrealized Gains   81
Available for Sale, Gross Unrealized Losses (3,789) (3,233)
Available for Sale 219,085 212,990
Held to Maturity, Amortized Cost 228,852 232,345
Held to Maturity, Gross Unrealized Gains 88  
Held to Maturity, Gross Unrealized Losses (16,247) (24,128)
Held to Maturity 212,693 208,217
Mortgage-backed Securities [Member]    
Marketable Securities [Line Items]    
Available for Sale, Amortized Cost 107,241 108,524
Available for Sale, Gross Unrealized Gains 59 41
Available for Sale, Gross Unrealized Losses (830) (920)
Available for Sale 106,470 107,645
Held to Maturity, Amortized Cost 9,939,008 10,409,133
Held to Maturity, Gross Unrealized Gains 4,705 380
Held to Maturity, Gross Unrealized Losses (1,094,059) (1,345,063)
Held to Maturity 8,849,654 9,064,450
U.S. Government Agencies [Member]    
Marketable Securities [Line Items]    
Held to Maturity, Amortized Cost 5,946 5,861
Held to Maturity, Gross Unrealized Losses (16) (44)
Held to Maturity 5,930 5,817
States and Political Subdivisions [Member]    
Marketable Securities [Line Items]    
Held to Maturity, Amortized Cost 80,190 98,125
Held to Maturity, Gross Unrealized Gains 219 220
Held to Maturity, Gross Unrealized Losses (2,142) (2,510)
Held to Maturity $ 78,267 $ 95,835