Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Total Non-interest Income	$ 11,658	$ 9,492
Core Banking
Disaggregation of Revenue [Line Items]
Non-interest Income (out-of-scope of Topic 606)	2,479	1,458
Trust and Investment Product Fees
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	1,567	1,773
Service Charges on Deposit Accounts
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	1,900	1,471
Insurance Revenues
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	3,205	2,930
Interchange Fee Income
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	2,095	1,482
In-Scope of Topic 606:
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	9,179	8,034
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)	1,567	1,773
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)	1,900	1,471
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)	2,095	1,482
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)	412	378
In-Scope of Topic 606: | Transferred over Time | Insurance Revenues | Insurance
Disaggregation of Revenue [Line Items]
Non-interest Income (in-scope of Topic 606)	$ 3,205	$ 2,930