Significant Accounting Policies (Details Textual)	3 Months Ended
	Mar. 31, 2018 USD ($)
Property, Plant and Equipment [Line Items]
Operating Leases, Future Minimum Payments Due	$ 11,000,000
Cumulative Effect on Retained Earnings, Net of Tax	0
Income From Insurance Commission	4,300,000
Income From Renewal Of Insurance Commission	3,300,000
Income From Contingent Consideration	1,000,000
OREO [Member]
Property, Plant and Equipment [Line Items]
Gain (Loss) on Disposition of Business	7,000
Other NonInterest Expense [Member]
Property, Plant and Equipment [Line Items]
Income From Service Charges	2,100,000
Income From Network related Charges	982,000
Wealth Management Revenue	214,000
Trust services Revenue	551,000
Retained Earnings [Member]
Property, Plant and Equipment [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax	$ (47,000)
Customer Contracts [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years
Customer Contracts [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years