Components Of Loss (Gain) On Disposal or Impairment Of Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Impairment Of Assets [Line Items]
Impairment of long-lived assets				$ 36,177
Goodwill and intangible assets impairment				9,497
China CTA gain realization				(8,853)
Gain on disposal of assets			$ (176)	(230)	$ (41)
Total			889	44,111	15,079
UNITED STATES
Impairment Of Assets [Line Items]
Impairment of long-lived assets			$ 1,065	42,664	4,956
CHINA
Impairment Of Assets [Line Items]
Impairment of long-lived assets		$ 10,164
China assets impairment	$ 1,033			1,033	$ 10,164
China CTA gain realization	$ (8,853)			$ (8,853)