Revenue From Contracts With Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	$ 3,153	$ 3,241
Service charges on deposit accounts | Over a period of time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	457	533
Service charges on deposit accounts | At a point in time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	2,696	2,708
Debit and credit card
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	2,974	3,037
Debit and credit card | Over a period of time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	185	188
Debit and credit card | At a point in time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	2,789	2,849
Wealth management
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	2,048	2,682
Wealth management | Over a period of time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	1,635	1,879
Wealth management | At a point in time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	413	803
Other fee revenue | At a point in time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	$ 919	$ 921