Registration of securities issued in business combination transactions

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 12 Months Ended
Sep. 30, 2013
Agreement
Dec. 31, 2012
Agreement
May 14, 2013
Jun. 27, 2011
Derivatives And Hedging Activities [Line Items]        
Number of interest rate swap agreements 2 2    
Notional amount of borrowings   $ 73.0   $ 73.0
Interest rate derivatives fixed interest rate     3.878% 3.878%
Nominal gain related to credit agreement   0.1    
Interest rate swap termination date May 14, 2013      
Maximum [Member]
       
Derivatives And Hedging Activities [Line Items]        
Fair value of the interest rate swap liability   $ 0.1