Reportable Segments, Schedule of Revenue by Major Customers, by Reporting Segments (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) Segment Customer	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Reportable Segments [Abstract]
Number of reportable segments | Segment	2
Property and Casualty Insurance [Member] | FedEx Ground, Certain Subsidiaries, and Related Entities [Member]
Revenue, Major Customer [Line Items]
Number of major customer | Customer	1
Direct And Assumed Premiums Written	$ 17,773	$ 18,951	$ 27,004
Property and Casualty Insurance [Member] | Non-affiliated Broker on Behalf of Independent Contractors [Member]
Revenue, Major Customer [Line Items]
Direct And Assumed Premiums Written	$ 209,434	$ 197,767	$ 171,615