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Goodwill and Other Intangible Assets - Goodwill (Detail) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2013
Goodwill [Line Items]  
Goodwill, Beginning Balance $ 60,744
Effect of change in foreign currency exchange rates (776)
Disposition of business (55,954)
Allocation to disposal group (4,014)
Goodwill, Ending Balance   
United States [Member]
 
Goodwill [Line Items]  
Goodwill, Beginning Balance 26,582
Effect of change in foreign currency exchange rates   
Disposition of business (22,568)
Allocation to disposal group (4,014)
Goodwill, Ending Balance   
Canada [Member]
 
Goodwill [Line Items]  
Goodwill, Beginning Balance 34,162
Effect of change in foreign currency exchange rates (776)
Disposition of business (33,386)
Allocation to disposal group   
Goodwill, Ending Balance