Quarterly report pursuant to Section 13 or 15(d)

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

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Line of Credit, Short-Term and Long-Term Borrowings - Long-Term Debt (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Note payable to bank one [Member]
  
Debt Instrument [Line Items]  
Monthly repayment installment of note payable 348,700
Variable interest rate of note payable 3.90%
Balloon payment required under note payable $ 76,976
Due date for note payable 2015-11
Note payable to bank two [Member]
  
Debt Instrument [Line Items]  
Monthly repayment installment of note payable 531,400
Fixed interest rate of note payable 3.54%
Balloon payment required under note payable 12,635
Due date for note payable 2015-12
Note payable to bank three [Member]
  
Debt Instrument [Line Items]  
Monthly repayment installment of note payable 483,900
Fixed interest rate of note payable 3.19%
Balloon payment required under note payable $ 11,670
Due date for note payable 2016-06
Note payable to TCF Equipment Finance, Inc. [Member]
  
Debt Instrument [Line Items]  
Monthly repayment installment of note payable 30,500
Fixed interest rate of note payable 5.24%
Due date for note payable 2019-07