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Debt - Summary of Carrying Amount and Fair Value of Financial Instruments (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Carrying Amounts and Fair Values of Financial Instruments [Line Items]    
Notional Amount, Short-term debt $ 6.1 $ 0
Short-term Debt
    
Carrying Amounts and Fair Values of Financial Instruments [Line Items]    
Notional Amount, Short-term debt 6.1 0
Fair Value 6.1 0
Long-term Debt
    
Carrying Amounts and Fair Values of Financial Instruments [Line Items]    
Notional Amount, Long-term debt 82.0 [1] 92.1 [1]
Fair Value $ 82.0 [1] $ 92.1 [1]
[1] Long-term debt includes current portions of long-term debt and current portions of capital lease obligations of $7.4 million and $7.4 million as of March 31, 2014 and December 31, 2013, respectively.