Equity and Cost Method Businesses - Results of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]
Revenue		$ 3,254		$ 5,808
Net income (loss)		(197)		(638)
Equity income (loss) excluding impairments and amortization of intangible assets		(272)		(536)
Amortization of intangible assets		(48)		(96)
Total equity income (loss)	$ 0	$ (320)	$ 0	$ (632)