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Cash - Additional Information (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Cash and Cash Equivalents [Line Items]        
Cash $ 28,747 $ 32,114 $ 22,275 $ 25,634
Cash Deposited In an Affiliate Financial Institution [Member]        
Cash and Cash Equivalents [Line Items]        
Cash 12,100 $ 7,800    
Territories Other Than Puerto Rico [Member]        
Cash and Cash Equivalents [Line Items]        
Cash $ 16,400