Significant Components of Net Deferred Income Tax Asset (Liability) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred income tax liabilities:
Depreciation and amortization	$ (3,826)	$ (5,945)
Intangibles	(5,162)	(4,645)
Equity in earnings	(805)	(1,964)
Other		(167)
Total deferred income tax liabilities	(9,793)	(12,721)
Net deferred income tax asset	3,376	1,214
Valuation allowance	(1,213)	(1,182)
Net deferred income tax asset (liability)	$ 2,163	$ 32