Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Total Non-interest Income	$ 8,882	$ 7,797	$ 18,374	$ 15,985
Core Banking
Disaggregation of Revenue [Line Items]
Non-interest Income (out-of-scope of Topic 606)	1,710	1,682	3,168	3,136
Trust and Investment Product Fees
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	1,677	1,350	3,450	2,593
Service Charges on Deposit Accounts
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	1,643	1,478	3,114	2,962
Insurance Revenues
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	1,696	1,744	4,626	4,384
Interchange Fee Income
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	1,714	1,156	3,196	2,179
In-Scope of Topic 606:
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	7,172	6,115	15,206	12,849
In-Scope of Topic 606: | Trust and Investment Product Fees | Trust and Investment Advisory Services
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	1,677	1,350	3,450	2,593
In-Scope of Topic 606: | Transferred at Point in Time | Service Charges on Deposit Accounts | Core Banking
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	1,643	1,478	3,114	2,962
In-Scope of Topic 606: | Transferred at Point in Time | Interchange Fee Income | Core Banking
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	1,714	1,156	3,196	2,179
In-Scope of Topic 606: | Transferred at Point in Time | Other Operating Income | Core Banking
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	442	387	820	731
In-Scope of Topic 606: | Transferred over Time | Insurance Revenues | Insurance
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	$ 1,696	$ 1,744	$ 4,626	$ 4,384