Quarterly report pursuant to Section 13 or 15(d)

Line of Credit, Short-Term and Long-Term Borrowings - Long-Term Borrowings (Detail)

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Line of Credit, Short-Term and Long-Term Borrowings - Long-Term Borrowings (Detail) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Long-term borrowings $ 73,187 $ 68,942
Less current installments 1,797 1,783
Total long-term borrowings 71,390 67,159
Modification Loan [Member] | Construction Loan Agreement [Member] | Joint Venture with HF Logistics [Member]    
Debt Instrument [Line Items]    
Long-term borrowings 66,968 68,059
Note payable to Luen Thai Enterprise, LTD [Member]    
Debt Instrument [Line Items]    
Long-term borrowings 5,580  
Notes payable to TCF Finance [Member] | Equipment Notes [Member]    
Debt Instrument [Line Items]    
Long-term borrowings $ 639 $ 883