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
Jun. 30, 2016
Dec. 31, 2015
Debt Instrument [Line Items]    
Long-term borrowings $ 69,828 $ 84,595
Less current installments 1,775 15,653
Total long-term borrowings 68,053 68,942
Modification Loan [Member] | Construction Loan Agreement [Member] | Joint Venture with HF Logistics [Member]    
Debt Instrument [Line Items]    
Long-term borrowings 68,787 69,515
Second Note [Member] | Equipment Notes [Member]    
Debt Instrument [Line Items]    
Long-term borrowings   13,886
Notes payable to TCF Finance [Member] | Equipment Notes [Member]    
Debt Instrument [Line Items]    
Long-term borrowings $ 1,041 $ 1,194