Quarterly report pursuant to Section 13 or 15(d)

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

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Line of Credit, Short-Term and Long-Term Borrowings - Long-Term Debt (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
Long-term debt $ 125,545 $ 128,516
Less: current installments 12,123 12,028
Total long-term debt 113,422 116,488
Note payable to bank one [Member]
    
Debt Instrument [Line Items]    
Note payable to banks 78,656 78,908
Note payable to bank two [Member]
    
Debt Instrument [Line Items]    
Note payable to banks 22,183 23,573
Note payable to bank three [Member]
    
Debt Instrument [Line Items]    
Note payable to banks 23,005 24,265
Note payable to TCF Equipment Finance, Inc. [Member]
    
Debt Instrument [Line Items]    
Note payable to TCF Equipment Finance, Inc. $ 1,701 $ 1,770