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Significant Components of Net Deferred Income Tax Asset (Liability) (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Deferred income tax liabilities:    
Depreciation and amortization $ (5,945) $ (4,867)
Intangibles (4,645) (6,679)
Equity in earnings (3,080) (998)
Other (167) (535)
Total deferred income tax liabilities (13,837) (13,079)
Net deferred income tax asset 1,214 175
Valuation allowance (1,182) (3,085)
Net deferred income tax asset (liability) $ 32 $ (2,910)