XML 17 R70.htm IDEA: XBRL DOCUMENT v2.4.0.8
Income Taxes - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Income Tax [Line Items]    
Unrecognized tax benefits expected to reverse $ 0  
Domestic [Member]
   
Income Tax [Line Items]    
Gross cumulative unrecognized tax benefits 2.1 2.1
Canada [Member]
   
Income Tax [Line Items]    
Gross cumulative unrecognized tax benefits $ 6.9 $ 7.9