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Investments - Investment Income (Expense) Comprised Primarily of Interest and Dividends (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Net Investment Income [Line Items]    
Total investment income $ 1,042 $ 208
Less investment expenses (524) (196)
Net investment (expense) income 518 12
Cash and Cash Equivalents [Member]
   
Net Investment Income [Line Items]    
Total investment income 12 120
Fixed Maturities [Member]
   
Net Investment Income [Line Items]    
Total investment income 728   
Equity Securities [Member]
   
Net Investment Income [Line Items]    
Total investment income $ 302 $ 88