Reinsurance - Ceded Premiums Earned and Reinsurance Recoveries on Losses and Loss Adjustment Expenses (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Insurance [Abstract]      
Ceded premiums earned $ 265 $ 201 $ 192
Reinsurance recoveries on losses and loss adjustment expenses $ 137 $ 285 $ 163