Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended			12 Months Ended
	Jun. 30, 2014	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Non-cash impairment charges							$ 38,000
Loss (gain) on disposal of assets					$ 1,443	$ (46,201)	(15,200)
Property plant and equipment improvement	$ 1,000
Intangible assets impairment charges						$ 2,000
Goodwill impairment charge				$ 47,000
ASA [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Property plant and equipment, fair value			$ 14,000
Non-cash impairment charges		$ 7,000	$ 4,000				$ 38,000
Loss (gain) on disposal of assets		$ 3,000
Property plant and equipment improvement	$ 11,000