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Securities - Fair Value and Age of Gross Unrealized Losses of Debt Securities (Details)
$ in Thousands
Jun. 30, 2026
USD ($)
security
Dec. 31, 2025
USD ($)
security
Number of Securities    
Less Than 12 Months | security 43 5
12 Months or More | security 74 87
Total | security 117 92
Fair Value    
Less Than 12 Months $ 361,093 $ 44,936
12 Months or More 408,718 514,419
Total 769,811 559,355
Unrealized Losses    
Less Than 12 Months (4,306) (81)
12 Months or More (42,816) (42,300)
Total $ (47,122) $ (42,381)
U.S. Treasury securities    
Number of Securities    
Less Than 12 Months | security 1 0
12 Months or More | security 4 7
Total | security 5 7
Fair Value    
Less Than 12 Months $ 9,841 $ 0
12 Months or More 39,522 69,409
Total 49,363 69,409
Unrealized Losses    
Less Than 12 Months (57) 0
12 Months or More (995) (1,984)
Total $ (1,052) $ (1,984)
Collateralized mortgage obligations of U.S. government corporations and agencies    
Number of Securities    
Less Than 12 Months | security 29 4
12 Months or More | security 52 55
Total | security 81 59
Fair Value    
Less Than 12 Months $ 235,534 $ 34,993
12 Months or More 260,286 299,732
Total 495,820 334,725
Unrealized Losses    
Less Than 12 Months (2,939) (52)
12 Months or More (33,064) (30,960)
Total $ (36,003) $ (31,012)
Residential mortgage-backed securities of U.S. government corporations and agencies    
Number of Securities    
Less Than 12 Months | security 1 0
12 Months or More | security 11 15
Total | security 12 15
Fair Value    
Less Than 12 Months $ 2,490 $ 0
12 Months or More 29,271 31,171
Total 31,761 31,171
Unrealized Losses    
Less Than 12 Months (28) 0
12 Months or More (4,730) (4,665)
Total $ (4,758) $ (4,665)
Commercial mortgage-backed securities of U.S. government corporations    
Number of Securities    
Less Than 12 Months | security 12 1
12 Months or More | security 7 10
Total | security 19 11
Fair Value    
Less Than 12 Months $ 113,228 $ 9,943
12 Months or More 79,639 114,107
Total 192,867 124,050
Unrealized Losses    
Less Than 12 Months (1,282) (29)
12 Months or More (4,027) (4,691)
Total $ (5,309) $ (4,720)