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Securities - Fair Value and Age of Gross Unrealized Losses of Debt Securities (Details)
$ in Thousands
Jun. 30, 2025
USD ($)
security
Dec. 31, 2024
USD ($)
security
Number of Securities    
Less Than 12 Months | security 17 41
12 Months or More | security 88 96
Total | security 105 137
Fair Value    
Less Than 12 Months $ 159,497 $ 366,890
12 Months or More 477,955 536,761
Total 637,452 903,651
Unrealized Losses    
Less Than 12 Months (1,760) (5,989)
12 Months or More (49,916) (66,740)
Total $ (51,676) $ (72,729)
U.S. Treasury securities    
Number of Securities    
Less Than 12 Months | security 4 5
12 Months or More | security 5 5
Total | security 9 10
Fair Value    
Less Than 12 Months $ 40,177 $ 45,045
12 Months or More 48,748 47,723
Total 88,925 92,768
Unrealized Losses    
Less Than 12 Months (124) (362)
12 Months or More (2,686) (3,915)
Total $ (2,810) $ (4,277)
Obligations of U.S. government corporations and agencies    
Number of Securities    
Less Than 12 Months | security 0 0
12 Months or More | security 1 2
Total | security 1 2
Fair Value    
Less Than 12 Months $ 0 $ 0
12 Months or More 10,163 15,071
Total 10,163 15,071
Unrealized Losses    
Less Than 12 Months 0 0
12 Months or More (54) (189)
Total $ (54) $ (189)
Collateralized mortgage obligations of U.S. government corporations and agencies    
Number of Securities    
Less Than 12 Months | security 10 22
12 Months or More | security 55 56
Total | security 65 78
Fair Value    
Less Than 12 Months $ 89,974 $ 209,511
12 Months or More 292,504 318,104
Total 382,478 527,615
Unrealized Losses    
Less Than 12 Months (1,347) (3,393)
12 Months or More (35,498) (44,885)
Total $ (36,845) $ (48,278)
Residential mortgage-backed securities of U.S. government corporations and agencies    
Number of Securities    
Less Than 12 Months | security 0 1
12 Months or More | security 19 21
Total | security 19 22
Fair Value    
Less Than 12 Months $ 0 $ 8
12 Months or More 32,398 33,030
Total 32,398 33,038
Unrealized Losses    
Less Than 12 Months 0 0
12 Months or More (5,588) (6,905)
Total $ (5,588) $ (6,905)
Commercial mortgage-backed securities of U.S. government corporations and agencies    
Number of Securities    
Less Than 12 Months | security 3 9
12 Months or More | security 8 12
Total | security 11 21
Fair Value    
Less Than 12 Months $ 29,346 $ 88,040
12 Months or More 94,142 122,833
Total 123,488 210,873
Unrealized Losses    
Less Than 12 Months (289) (1,741)
12 Months or More (6,090) (10,846)
Total $ (6,379) $ (12,587)
Obligations of states and political subdivisions    
Number of Securities    
Less Than 12 Months | security 0 4
12 Months or More | security 0 0
Total | security 0 4
Fair Value    
Less Than 12 Months $ 0 $ 24,286
12 Months or More 0 0
Total 0 24,286
Unrealized Losses    
Less Than 12 Months (493)
12 Months or More 0 0
Total $ 0 $ (493)