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Debt Obligations - Current Maturities of Long-Term Debt and Short-Term Debt (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Short-term Debt [Abstract]    
Short-term debt $ 2,735 $ 4,829
Current maturities of long-term debt 4,828 2,238
Current maturities of long-term debt and short-term debt $ 7,563 $ 7,067