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Long-Term Debt - Schedule of Long-Term Debt (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Debt Instrument [Line Items]  
Weighted-average interest rate of other debt 3.91%
Working Capital Revolver Loan [Member]
  
Debt Instrument [Line Items]  
Maximum amount of revolving credit facility $ 50
Description of interest rate of Revolving Credit Facility Interest at a base rate (generally equivalent to the prime rate) plus 0.50% if borrowing availability is greater than $25 million, otherwise plus 0.75% or, at our option, accrues interest at LIBOR plus 1.50% if borrowing availability is greater than $25 million, otherwise plus 1.75%.
Line of credit facility, interest rate 3.75%
Maturity date Mar. 29, 2016
Working Capital Revolver Loan maturity date conditional extension Apr. 13, 2017
Remaining borrowing under Working Capital Revolver Loan 48.4
Carrying value of the pledged assets 217
Secured Term Loan [Member]
  
Debt Instrument [Line Items]  
Maturity date Mar. 29, 2016
Carrying value of the pledged assets 128
Periodic principal payments of Secured Term Loan 0.9
Interest and final balloon payment of Secured Term Loan 56.3
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%
Carrying value of restricted net assets 130
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]  
Maturity date Feb. 01, 2016
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 3.28%
Final balloon payment $ 15.3
Other, with current weighted-average interest rate of 6.82%, most of which is secured by machinery, equipment and real estate [Member]
  
Debt Instrument [Line Items]  
Weighted-average interest rate of other debt 6.82%