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Related Party Transactions - Payments Made by Company to Downes and Associates (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Downes and Associates [Member]
   
Related Party Transaction [Line Items]    
Payments made by the company to related party    $ 129
SPC Global RE Advisors LLC [Member]
   
Related Party Transaction [Line Items]    
Payments made by the company to related party $ 30