Selected Financial Information (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended									12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Mar. 31, 2016	Mar. 31, 2015		Mar. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Goodwill impairment						$ (283,699)			$ (56,283)		$ (283,699)	[1]	$ (56,283)
Gain on asset dispositions, net	$ 6,692	$ 5,883	$ 6,111	$ 7,351	$ 10,704	$ 4,699	$ 4,500	$ 3,893		$ 26,037	$ 23,796		$ 21,063

[1] The total carrying amount of goodwill at March 31, 2014 is net of accumulated impairment charges $30.9 million and $56.3 million related to the Middle East/North Africa and Asia/Pacific segments, respectively.