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Summary of Significant Accounting Policies, Revenue from Contracts with Customers (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Noninterest Income [Abstract]      
Total noninterest income in-scope of ASC 606 $ 144,742 $ 150,665 $ 151,011
Total noninterest income out-of-scope of ASC 606 (2,564) 4,913 6,783
Total noninterest income 142,178 155,578 157,794
Service Charges on Deposit Accounts [Member]      
Noninterest Income [Abstract]      
Total noninterest income in-scope of ASC 606 15,424 14,630 13,348
Card Services Income [Member]      
Noninterest Income [Abstract]      
Total noninterest income in-scope of ASC 606 20,829 29,058 34,682
Retirement Plan Administration Fees [Member]      
Noninterest Income [Abstract]      
Total noninterest income in-scope of ASC 606 47,221 48,112 42,188
Wealth Management [Member]      
Noninterest Income [Abstract]      
Total noninterest income in-scope of ASC 606 34,763 33,311 33,718
Insurance Services [Member]      
Noninterest Income [Abstract]      
Total noninterest income in-scope of ASC 606 15,667 14,696 14,083
Other [Member]      
Noninterest Income [Abstract]      
Total noninterest income in-scope of ASC 606 $ 10,838 $ 10,858 $ 12,992