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Insurance Activity - Schedule of Premiums Assumed and Earned (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Insurance [Abstract]        
Premiums assumed $ 1,673 $ 3,189 $ 3,712 $ 6,563
Change in unearned premiums 40 (1,455) 167 (1,424)
Premiums earned $ 1,713 $ 1,734 $ 3,879 $ 5,139