Summary of Significant Accounting Policies, Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Noninterest Income [Abstract]
Total noninterest income in-scope of ASC 606	$ 151,011	$ 140,921	$ 134,455
Total noninterest income out-of-scope of ASC 606	6,783	5,355	9,568
Total noninterest income	157,794	146,276	144,023
Service Charges on Deposit Accounts [Member]
Noninterest Income [Abstract]
Total noninterest income in-scope of ASC 606	13,348	13,201	17,151
ATM and Debit Card Fees [Member]
Noninterest Income [Abstract]
Total noninterest income in-scope of ASC 606	31,301	25,960	23,893
Retirement Plan Administration Fees [Member]
Noninterest Income [Abstract]
Total noninterest income in-scope of ASC 606	42,188	35,851	30,388
Wealth Management [Member]
Noninterest Income [Abstract]
Total noninterest income in-scope of ASC 606	33,718	29,247	28,400
Insurance Services [Member]
Noninterest Income [Abstract]
Total noninterest income in-scope of ASC 606	14,083	14,757	15,770
Other [Member]
Noninterest Income [Abstract]
Total noninterest income in-scope of ASC 606	$ 16,373	$ 21,905	$ 18,853