Quarterly report pursuant to Section 13 or 15(d)

Contingencies - Additional Information (Detail)

v2.4.0.8
Contingencies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Loss Contingencies [Line Items]    
Maximum exposure associated with general indemnifications $ 14.0 $ 19.0
General indemnifications minimum expiration period 12 months  
General indemnifications maximum expiration period 24 months  
Joint venture ownership percentage 50.00%  
Contingent liability reserve balance after reduction 2.8 2.8
Other Accrued Liabilities [Member]
   
Loss Contingencies [Line Items]    
Amount reserved for pending proceedings 0.4 2.1
Other Long-Term Liabilities [Member]
   
Loss Contingencies [Line Items]    
Amount reserved for pending proceedings $ 0.9 $ 1.3