Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments - Additional Information (Detail)

v2.4.0.8
Derivative Financial Instruments - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2013
agreement
Jun. 27, 2011
Jun. 30, 2013
Maximum [Member]
Dec. 31, 2012
Maximum [Member]
Derivatives And Hedging Activities [Line Items]        
Number of interest rate swap agreements 2      
Notional amount of borrowings $ 73.0      
Interest rate derivatives fixed interest rate   3.878%    
Interest rate swap termination date 5/14/2013      
Fair value of the interest rate swap liability     $ 0.1 $ 0.1