Revenue From Contracts With Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 11,704	$ 13,316	$ 13,096
Service charges on deposit accounts | Over a period of time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,797	1,859	1,972
Service charges on deposit accounts | At a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	9,907	11,457	11,124
Debit and credit card
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	15,093	13,405	12,679
Debit and credit card | Over a period of time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	738	723	657
Debit and credit card | At a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	14,355	12,682	12,022
Wealth management
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	9,957	8,623	10,084
Wealth management | Over a period of time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	7,919	6,939	7,113
Wealth management | At a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	2,038	1,684	2,971
Other fee revenue | At a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 3,722	$ 3,836	$ 3,854