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Securities, Available for Sale (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Debt securities, available-for-sale [Abstract]      
Amortized cost $ 1,615,078 $ 1,743,882  
Unrealized gains 47 38  
Unrealized losses (184,267) (216,695)  
Estimated fair value 1,430,858 1,527,225  
Allowance for credit losses on AFS securities 0 0  
Gross realized losses 4,500 0 $ 0
Gross realized gains   0 $ 0
U.S. Treasury [Member]      
Debt securities, available-for-sale [Abstract]      
Amortized cost 133,302 132,891  
Unrealized gains 0 0  
Unrealized losses (8,278) (11,233)  
Estimated fair value 125,024 121,658  
Federal Agency [Member]      
Debt securities, available-for-sale [Abstract]      
Amortized cost 248,384 248,419  
Unrealized gains 0 0  
Unrealized losses (33,644) (42,000)  
Estimated fair value 214,740 206,419  
State & Municipal [Member]      
Debt securities, available-for-sale [Abstract]      
Amortized cost 96,251 97,036  
Unrealized gains 11 5  
Unrealized losses (9,956) (14,190)  
Estimated fair value 86,306 82,851  
Mortgage-Backed, Government Sponsored Enterprises [Member]      
Debt securities, available-for-sale [Abstract]      
Amortized cost 399,532 454,177  
Unrealized gains 7 9  
Unrealized losses (44,264) (54,675)  
Estimated fair value 355,275 399,511  
Mortgage-backed Securities, U.S. Government Agency Securities [Member]      
Debt securities, available-for-sale [Abstract]      
Amortized cost 74,281 81,844  
Unrealized gains 14 15  
Unrealized losses (7,302) (7,676)  
Estimated fair value 66,993 74,183  
Collateralized Mortgage Obligations, Government-Sponsored Enterprises [Member]      
Debt securities, available-for-sale [Abstract]      
Amortized cost 452,715 498,021  
Unrealized gains 15 9  
Unrealized losses (48,257) (59,473)  
Estimated fair value 404,473 438,557  
Collateralized Mortgage Obligations, U.S. Government Agency Securities [Member]      
Debt securities, available-for-sale [Abstract]      
Amortized cost 162,171 171,090  
Unrealized gains 0 0  
Unrealized losses (25,100) (21,284)  
Estimated fair value 137,071 149,806  
Corporate [Member]      
Debt securities, available-for-sale [Abstract]      
Amortized cost 48,442 60,404  
Unrealized gains 0 0  
Unrealized losses (7,466) (6,164)  
Estimated fair value 40,976 $ 54,240  
Loss on the write-off of an AFS debt security $ 5,000