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
9 Months Ended
Sep. 30, 2013
agreement
Jun. 27, 2011
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