Acquisitions (Other Details) (Details) - Jan. 31, 2015 - Latin American Underwriters Holdings Ltd [Member] - USD ($) $ in Thousands	Total
Business Acquisition [Line Items]
Fair value of consideration transferred	$ 5,105
Goodwill acquired during the period	2,467
Finite lived intangible assets acquired	$ 3,610
Estimated useful life of finite lived intangibe assets	5 years
Contingent consideration	$ 1,000