Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Non-interest income from contracts with customers	$ 16,559	$ 14,213	$ 31,305	$ 27,680
Non-interest income within the scope of other GAAP topics	1,266	1,398	2,445	2,425
Noninterest Income	17,825	15,611	33,750	30,105
Fees and Commissions, Depositor Accounts
Disaggregation of Revenue [Line Items]
Non-interest income from contracts with customers	7,778	7,323	15,099	14,185
Fees and Commissions, Debit Cards
Disaggregation of Revenue [Line Items]
Non-interest income from contracts with customers	5,522	4,532	10,491	8,866
Fees and Commissions, Fiduciary and Trust Accounts
Disaggregation of Revenue [Line Items]
Non-interest income from contracts with customers	1,699	1,645	3,341	3,214
Other Non-Interest Income
Disaggregation of Revenue [Line Items]
Non-interest income from contracts with customers	$ 1,560	$ 713	$ 2,374	$ 1,415