Revenue Recognition Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue from Contracts with Customers [Line Items]
Insurance commissions	$ 1,174	$ 1,113
Noninterest Income, Other Operating Income	241	249
Non-interest income within the scope of other ASC topics	389	1,203
Noninterest Income	4,230	4,876
Revenue in Scope ASC 606 [Member]
Revenue from Contracts with Customers [Line Items]
Insurance commissions	1,174	1,113
Noninterest Income, Other Operating Income	87	53
Total Revenue in ASC 606	3,841	3,673
Deposit Account [Member]
Revenue from Contracts with Customers [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,180	1,091
Deposit Account [Member] | Revenue in Scope ASC 606 [Member]
Revenue from Contracts with Customers [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,180	1,091
Credit and Debit Card [Member]
Revenue from Contracts with Customers [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	814	749
Credit and Debit Card [Member] | Revenue in Scope ASC 606 [Member]
Revenue from Contracts with Customers [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	814	749
Fiduciary and Trust [Member]
Revenue from Contracts with Customers [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	586	667
Fiduciary and Trust [Member] | Revenue in Scope ASC 606 [Member]
Revenue from Contracts with Customers [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 586	$ 667