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Investment Securities - Schedule of Held-to-Maturity Amortized Cost and Fair Value (Details) - USD ($)
Jun. 30, 2024
Dec. 31, 2023
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]    
Debt securities, held-to-maturity $ 904,610,000 $ 925,198,000
Allowance for Credit Losses 0 0
Net Carrying Amount 904,610,000 925,198,000
Held-to-maturity, gross unrealized gains 0 75,000
Held-to-maturity, gross unrealized losses (121,213,000) (110,443,000)
Total 783,397,000 814,830,000
Accrued interest 3,500,000 3,600,000
MBS pass-through securities issued by FHLMC, FNMA and GNMA    
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]    
Debt securities, held-to-maturity 295,940,000 306,261,000
Allowance for Credit Losses 0 0
Net Carrying Amount 295,940,000 306,261,000
Held-to-maturity, gross unrealized gains 0 0
Held-to-maturity, gross unrealized losses (48,998,000) (44,396,000)
Total 246,942,000 261,865,000
CMOs issued by FHLMC    
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]    
Debt securities, held-to-maturity 222,619,000 226,416,000
Allowance for Credit Losses 0 0
Net Carrying Amount 222,619,000 226,416,000
Held-to-maturity, gross unrealized gains 0 28,000
Held-to-maturity, gross unrealized losses (27,340,000) (24,869,000)
Total 195,279,000 201,575,000
CMOs issued by FNMA    
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]    
Debt securities, held-to-maturity 95,887,000 101,502,000
Allowance for Credit Losses 0 0
Net Carrying Amount 95,887,000 101,502,000
Held-to-maturity, gross unrealized gains 0 0
Held-to-maturity, gross unrealized losses (6,307,000) (4,779,000)
Total 89,580,000 96,723,000
CMOs issued by GNMA    
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]    
Debt securities, held-to-maturity 50,437,000 51,006,000
Allowance for Credit Losses 0 0
Net Carrying Amount 50,437,000 51,006,000
Held-to-maturity, gross unrealized gains 0 0
Held-to-maturity, gross unrealized losses (5,680,000) (5,235,000)
Total 44,757,000 45,771,000
SBA-backed securities    
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]    
Debt securities, held-to-maturity 1,652,000 1,853,000
Allowance for Credit Losses 0 0
Net Carrying Amount 1,652,000 1,853,000
Held-to-maturity, gross unrealized gains 0 0
Held-to-maturity, gross unrealized losses (91,000) (90,000)
Total 1,561,000 1,763,000
Debentures of government- sponsored agencies    
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]    
Debt securities, held-to-maturity 146,277,000 146,126,000
Allowance for Credit Losses 0 0
Net Carrying Amount 146,277,000 146,126,000
Held-to-maturity, gross unrealized gains 0 0
Held-to-maturity, gross unrealized losses (23,209,000) (21,994,000)
Total 123,068,000 124,132,000
Obligations of state and political subdivisions    
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]    
Debt securities, held-to-maturity 61,798,000 62,034,000
Allowance for Credit Losses 0 0
Net Carrying Amount 61,798,000 62,034,000
Held-to-maturity, gross unrealized gains 0 47,000
Held-to-maturity, gross unrealized losses (8,391,000) (7,884,000)
Total 53,407,000 54,197,000
Corporate bonds    
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]    
Debt securities, held-to-maturity 30,000,000 30,000,000
Allowance for Credit Losses 0 0
Net Carrying Amount 30,000,000 30,000,000
Held-to-maturity, gross unrealized gains 0 0
Held-to-maturity, gross unrealized losses (1,197,000) (1,196,000)
Total $ 28,803,000 $ 28,804,000