Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Non-interest Income (out-of-scope of Topic 606)	$ 4,953	$ 5,217	$ 6,325
Total Non-interest Income	37,070	31,854	32,013
Trust and Investment Product Fees
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	6,680	5,272	4,644
Service Charges on Deposit Accounts
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	7,044	6,178	5,973
Insurance Revenues
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	8,330	7,979	7,741
Interchange Fee Income
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	7,278	4,567	3,627
In-Scope of Topic 606:
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	32,117	26,637	25,688
In-Scope of Topic 606: | Trust and Investment Product Fees
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	6,680	5,272	4,644
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)	7,044	6,178	5,973
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)	7,278	4,567	3,627
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)	2,785	2,641	3,703
In-Scope of Topic 606: | Transferred over Time | Insurance Revenues
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	$ 8,330	$ 7,979	$ 7,741