Acquisition and related Goodwill and Intangibles (Details) - Transportation Specialty Insurance Agency [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Date of acquisition agreement	Oct. 31, 2008
Cash purchase price	$ 3,500
Recorded goodwill	3,152
Intangible assets acquired	179
Accumulated amortization on intangible assets	$ 179	$ 179