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Senior Debt - Summary of Debt (Detail) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Total outstanding borrowings $ 119,417 $ 123,193
Less: current portion 8,852 8,827
Total debt, less current portion 110,565 114,366
Term Loan [Member]    
Debt Instrument [Line Items]    
Total outstanding borrowings 121,034 125,072
China Facility [Member]    
Debt Instrument [Line Items]    
Total outstanding borrowings under Credit Facility 1,306 1,296
Term Debt [Member]    
Debt Instrument [Line Items]    
Unamortized debt discount (2,923) (3,175)
US Dollar Borrowings [Member] | Term Loan [Member]    
Debt Instrument [Line Items]    
Total outstanding borrowings $ 118,111 $ 121,897