Revenue Recognition - Schedule of Disaggregation of Noninterest Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	$ 65,746	$ 67,555	$ 65,961
Noninterest Income (out-of-scope of ASC 606)	8,114	7,878	11,488
Total Noninterest Income	73,860	75,433	77,449
Insurance Revenues
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	31,505	31,091	29,369
Investment Service Income
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	17,520	16,434	17,288
Service Charges on Deposit Accounts
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	6,312	8,321	8,435
Card Services Income
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	9,263	10,526	9,693
Other
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	$ 1,146	$ 1,183	$ 1,176