Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Non-interest Income (out-of-scope of Topic 606)	$ 1,458	$ 1,454
Total Non-interest Income	9,492	8,188
In-Scope of Topic 606:
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	8,034	6,734
In-Scope of Topic 606: | Trust and Investment Product Fees
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	1,773	1,243
In-Scope of Topic 606: | Transferred at Point in Time | Service Charges on Deposit Accounts
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	1,471	1,484
In-Scope of Topic 606: | Transferred at Point in Time | Interchange Fee Income
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	1,482	1,023
In-Scope of Topic 606: | Transferred at Point in Time | Other Operating Income
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	378	344
In-Scope of Topic 606: | Transferred over Time | Insurance Revenues
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	$ 2,930	$ 2,640