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Securities & Allowance for Securities Credit Losses - Unrealized Loss Position (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Schedule of Available-for-sale and Held-to-Maturity Securities [Line Items]    
Unrealized loss position for less than 12 months, unrealized loss $ (45) $ (50)
Unrealized loss position for less than 12 months, fair value 22,539 12,017
Unrealized loss position for more than 12 months, unrealized loss (5,756) (10,070)
Unrealized loss position for more than 12 months, fair value 175,569 221,325
Available-for Sale, Gross Unrealized Losses, Total (5,801) (10,120)
Available-for Sale, Fair Value of Investments with Unrealized Losses, Total 198,108 233,342
U.S. government and federal agencies    
Schedule of Available-for-sale and Held-to-Maturity Securities [Line Items]    
Unrealized loss position for less than 12 months, unrealized loss (1) (16)
Unrealized loss position for less than 12 months, fair value 10,997 5,860
Unrealized loss position for more than 12 months, unrealized loss (1,415) (2,848)
Unrealized loss position for more than 12 months, fair value 46,445 70,906
Available-for Sale, Gross Unrealized Losses, Total (1,416) (2,864)
Available-for Sale, Fair Value of Investments with Unrealized Losses, Total 57,442 76,766
Mortgage backed securities    
Schedule of Available-for-sale and Held-to-Maturity Securities [Line Items]    
Unrealized loss position for less than 12 months, unrealized loss 0 0
Unrealized loss position for less than 12 months, fair value 27 0
Unrealized loss position for more than 12 months, unrealized loss (429) (609)
Unrealized loss position for more than 12 months, fair value 8,170 8,604
Available-for Sale, Gross Unrealized Losses, Total (429) (609)
Available-for Sale, Fair Value of Investments with Unrealized Losses, Total 8,197 8,604
Corporate Bonds    
Schedule of Available-for-sale and Held-to-Maturity Securities [Line Items]    
Unrealized loss position for less than 12 months, unrealized loss (17) (3)
Unrealized loss position for less than 12 months, fair value 5,454 2,482
Unrealized loss position for more than 12 months, unrealized loss (733) (1,834)
Unrealized loss position for more than 12 months, fair value 37,865 51,987
Available-for Sale, Gross Unrealized Losses, Total (750) (1,837)
Available-for Sale, Fair Value of Investments with Unrealized Losses, Total 43,319 54,469
State and municipal securities    
Schedule of Available-for-sale and Held-to-Maturity Securities [Line Items]    
Unrealized loss position for less than 12 months, unrealized loss (27) (31)
Unrealized loss position for less than 12 months, fair value 6,061 3,675
Unrealized loss position for more than 12 months, unrealized loss (3,179) (4,779)
Unrealized loss position for more than 12 months, fair value 83,089 89,828
Available-for Sale, Gross Unrealized Losses, Total (3,206) (4,810)
Available-for Sale, Fair Value of Investments with Unrealized Losses, Total $ 89,150 $ 93,503