Impairment of Long-lived Assets (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Impairment of long-lived assets
Total impairment loss of long-lived assets	$ 53,300,000		$ 14,900,000
Impairment loss of property, plant and equipment	17,700,000
Impairment loss of intangible assets	35,600,000
Impairment losses of intangible assets, indefinte-lived	$ 21,200,000		$ 14,900,000
Impairment of long-lived assets		$ 0