Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments - Additional Information (Detail)

v2.4.0.8
Fair Value of Financial Instruments - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
Apr. 22, 2013
ITS [Member]
Dec. 31, 2012
Significant Other Observable Inputs (Level 2) [Member]
Maximum [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Carrying amount of interest rate swap agreements   $ 0.1
Contingent cash payment $ 5.0