Equity and Cost Method Businesses - Results of Operations (Unaudited) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]
Revenue		$ 1,421		$ 7,229
Net income (loss)		(548)		(1,186)
Equity income (loss) excluding impairments and amortization of intangible assets		(96)		(632)
Amortization of intangible assets		(48)		(144)
Total equity income (loss)	$ 0	$ (144)	$ 0	$ (776)