Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Land	$ 74,600	$ 39,800
Buildings and equipment	139,908	81,488
Other	6,355	2,035
Total property, plant and equipment	220,863	123,323
Proved oil and gas properties	1,122	1,122
Less accumulated depreciation and depletion	(26,845)	(11,510)
Property, plant and equipment, net	195,140	112,935
Depreciation and depletion expense	$ 15,300	$ 11,200	$ 3,700