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Securities - Available-for-Sale and Held-to-Maturity by Contractual Maturity (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Securities held-to-maturity, Amortized Cost, Due after ten years $ 66,548          
Securities, held-to-maturity, Amortized Cost 74,413          
Securities held-to-maturity, Allowance for credit losses (1,079) $ (1,087) $ (1,100) $ (1,085) $ (986) $ (862)
Securities held-to-maturity 73,334   73,711      
Securities held-to-maturity, Fair Value, Due after ten years 57,326          
Debt Securities, Held-to-maturity, Fair Value, Total 64,337   62,550      
Securities available-for-sale, Amortized Cost, Due in one year or less 59,888          
Securities available-for-sale, Amortized Cost, Due after one years through five years 74,823          
Securities available-for-sale, Amortized Cost, Due after five years through ten years 255,416          
Securities available-for-sale, Amortized Cost, Due after ten years 130,212          
Securities available-for-sale 967,095          
Securities available for sale, Fair Value, Due in one year or less 58,498          
Securities available for sale, Fair Value, Due after one years through five years 69,033          
Securities available for sale, Fair Value, Due after five years through ten years 235,696          
Securities available for sale, Fair Value, Due after ten years 129,072          
Securities, available-for-sale, Fair Value 869,556   735,357      
Basis adjustments 6,625          
Designated as Hedging Instrument [Member] | Portfolio Layer Hedges on Closed Portfolio of Securities Available for Sale [Member]            
Basis adjustments 5,500          
Total Other Securities [Member]            
Securities, held-to-maturity, Amortized Cost, With single maturity date 66,548          
Securities held-to-maturity, Fair Value, With single maturity date 57,326          
Securities available-for-sale, Amortized Cost, With single maturity date 520,339          
Securities available-for-sale, Fair Value, With single maturity date 492,299          
Collateralized Mortgage Backed Securities            
Securities held-to-maturity, Amortized Cost, Without single maturity 7,865          
Securities, held-to-maturity, Amortized Cost 7,865   7,875      
Securities held-to-maturity, Fair Value, Without single maturity date 7,011          
Debt Securities, Held-to-maturity, Fair Value, Total 7,011   6,989      
Securities, available-for-sale, Amortized Cost, Without single maturity date 435,410          
Securities available-for-sale 435,410          
Securities available-for-sale, Fair Value, Without single maturity date 365,911          
Securities, available-for-sale, Fair Value 365,911   384,283      
Mutual Fund Debt Securities [Member]            
Securities, available-for-sale, Amortized Cost, Without single maturity date 11,346          
Securities available-for-sale 11,346          
Securities available-for-sale, Fair Value, Without single maturity date 11,346          
Securities, available-for-sale, Fair Value $ 11,346   $ 11,211