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Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2012
Intangible Assets And Goodwill [Line Items]    
Goodwill and intangible assets, beginning balance   $ 46,937
Impairment of trade name (1,069) (1,069)
Amortization   (1,200)
Goodwill and intangible assets, ending balance $ 44,668 $ 44,668