Acquisition and related Goodwill and Intangibles (Details) (Transportation Specialty Insurance Agency [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Date of acquisition agreement	Oct. 31, 2008
Cash purchase price	$ 3,500
Recorded goodwill	3,152
Customer Relationships and Employment Agreements [Member]
Business Acquisition [Line Items]
Intangible assets included in other assets	179
Amortization of intangible assets	4	17	28
Accumulated amortization on intangible assets	$ 179	$ 175