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Investment Securities - Unrealized losses (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Schedule of Available-for-sale Securities    
Debt securities, amortized cost $ 669,646 $ 740,468
Less than 12 Months, Fair Value 392 237,917
12 Months or More, Fair Value 595,686 410,654
Total Fair Value 596,078 648,571
Less than 12 Months, Unrealized Losses (3) (27,795)
12 Months or More, Unrealized Losses (72,460) (63,866)
Total Unrealized Losses (72,463) (91,661)
Held-to-maturity Securities, Less than 12 Months, Fair Value 108 91,701
Held-to-maturity Securities, Less than 12 Months, Unrealized Losses (1) (8,982)
Held-to-maturity Securities, 12 Months or More, Fair Value 274,360 176,980
Held-to-maturity Securities, 12 Months or More,Unrealized Losses (26,559) (24,943)
Held-to-maturity Securities, Total Fair Value 274,468 268,681
Held-to-maturity Securities, Total Unrealized Losses (26,560) (33,925)
U.S. Government agencies    
Schedule of Available-for-sale Securities    
Debt securities, amortized cost 102 107
Less than 12 Months, Fair Value 0 0
12 Months or More, Fair Value 95 98
Total Fair Value 95 98
Less than 12 Months, Unrealized Losses 0 0
12 Months or More, Unrealized Losses (7) (9)
Total Unrealized Losses (7) (9)
Obligations of states and political subdivisions    
Schedule of Available-for-sale Securities    
Debt securities, amortized cost 198,070 201,638
Less than 12 Months, Fair Value 0 90,808
12 Months or More, Fair Value 180,222 84,177
Total Fair Value 180,222 174,985
Less than 12 Months, Unrealized Losses 0 (12,208)
12 Months or More, Unrealized Losses (17,848) (14,445)
Total Unrealized Losses (17,848) (26,653)
Held-to-maturity Securities, Less than 12 Months, Fair Value 108 48,311
Held-to-maturity Securities, Less than 12 Months, Unrealized Losses (1) (5,505)
Held-to-maturity Securities, 12 Months or More, Fair Value 175,309 118,026
Held-to-maturity Securities, 12 Months or More,Unrealized Losses (14,187) (17,661)
Held-to-maturity Securities, Total Fair Value 175,417 166,337
Held-to-maturity Securities, Total Unrealized Losses (14,188) (23,166)
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations    
Schedule of Available-for-sale Securities    
Debt securities, amortized cost 88,874 117,292
Less than 12 Months, Fair Value 392 20,825
12 Months or More, Fair Value 82,760 88,520
Total Fair Value 83,152 109,345
Less than 12 Months, Unrealized Losses (3) (1,058)
12 Months or More, Unrealized Losses (5,522) (6,745)
Total Unrealized Losses (5,525) (7,803)
Held-to-maturity Securities, Less than 12 Months, Fair Value 0 0
Held-to-maturity Securities, Less than 12 Months, Unrealized Losses 0 0
Held-to-maturity Securities, 12 Months or More, Fair Value 9,066 8,668
Held-to-maturity Securities, 12 Months or More,Unrealized Losses (1,692) (1,762)
Held-to-maturity Securities, Total Fair Value 9,066 8,668
Held-to-maturity Securities, Total Unrealized Losses (1,692) (1,762)
Private label residential mortgage and asset backed securities    
Schedule of Available-for-sale Securities    
Debt securities, amortized cost 372,610 411,441
Less than 12 Months, Fair Value 0 126,284
12 Months or More, Fair Value 323,655 229,152
Total Fair Value 323,655 355,436
Less than 12 Months, Unrealized Losses 0 (14,529)
12 Months or More, Unrealized Losses (48,047) (41,384)
Total Unrealized Losses (48,047) (55,913)
Held-to-maturity Securities, Less than 12 Months, Fair Value 0 19,393
Held-to-maturity Securities, Less than 12 Months, Unrealized Losses 0 (1,916)
Held-to-maturity Securities, 12 Months or More, Fair Value 48,635 31,367
Held-to-maturity Securities, 12 Months or More,Unrealized Losses (5,944) (4,015)
Held-to-maturity Securities, Total Fair Value 48,635 50,760
Held-to-maturity Securities, Total Unrealized Losses (5,944) (5,931)
Corporate Debt Securities    
Schedule of Available-for-sale Securities    
Debt securities, amortized cost   0
Held-to-maturity Securities, Less than 12 Months, Fair Value 0 23,997
Held-to-maturity Securities, Less than 12 Months, Unrealized Losses 0 (1,561)
Held-to-maturity Securities, 12 Months or More, Fair Value 41,350 18,919
Held-to-maturity Securities, 12 Months or More,Unrealized Losses (4,736) (1,505)
Held-to-maturity Securities, Total Fair Value 41,350 42,916
Held-to-maturity Securities, Total Unrealized Losses (4,736) (3,066)
US Treasury Securities    
Schedule of Available-for-sale Securities    
Debt securities, amortized cost 9,990 9,990
Less than 12 Months, Fair Value 0 0
12 Months or More, Fair Value 8,954 8,707
Total Fair Value 8,954 8,707
Less than 12 Months, Unrealized Losses 0 0
12 Months or More, Unrealized Losses (1,036) (1,283)
Total Unrealized Losses $ (1,036) $ (1,283)