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Long-Term Debt - Schedule of Long-Term Debt (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified
 6 Months Ended
Jun. 30, 2013
Working Capital Revolver Loan [Member]
  
Debt Instrument [Line Items]  
Maximum amount of revolving credit facility $ 50.0
Secured Term Loan [Member]
  
Debt Instrument [Line Items]  
Weighted-average interest rate of other debt 3.90%
Secured Promissory Notes, interest rate description Three-month LIBOR plus 300 basis points, a rate that is adjusted quarterly
Period for LIBOR 3 months
Borrowing interest rate basis spread 3.00%
Secured Term Loan agreement requirements Borrowers are also subject to a minimum fixed charge coverage ratio of not less than 1.10 to 1 and a maximum leverage ratio of not greater than 4.50 to 1
Percentage of principal amount as prepayment premium 1.00%
End date of prepayment premium period Mar. 29, 2014
Secured Promissory Note [Member]
  
Debt Instrument [Line Items]  
Secured Promissory Notes, interest rate description Principal and interest are payable monthly based on a five-year amortization at a defined LIBOR rate plus 300 basis points (but not below 3.00% per annum)
Secured Promissory Note, principal amount 35
Proceeds of the Secured Promissory Note 35
Purchase price of business acquisition 50
Secured Promissory Note, interest rate 3.27%
Final balloon payment $ 15.3
Maturity date Feb. 01, 2016
Other, with a current weighted-average interest rate of 5.48%, most of which is secured by machinery, equipment and real estate [Member]
  
Debt Instrument [Line Items]  
Weighted-average interest rate of other debt 5.48%