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Long-Term Debt - Schedule of Long-Term Debt (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Debt Instrument [Line Items]    
Total $ 15,028 $ 24,050
Surplus Note [Member]    
Debt Instrument [Line Items]    
Notes payable 14,338 15,809
Term Loan [Member]    
Debt Instrument [Line Items]    
Term loan   6,851
Promissory Note [Member]    
Debt Instrument [Line Items]    
Notes payable $ 690 $ 1,390