Capitalized Interest - Summary of Interest Costs Incurred, Capitalized, Expensed and Charged to Cost of Sales (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest Costs Incurred [Abstract]
Interest capitalized, beginning of period	$ 893	$ 0
Interest incurred	25,048	8,422
Interest charged to interest expense	(22,385)	(7,529)	(1,892)
Interest charged to cost of sales	(262)		0
Interest capitalized, end of period	$ 3,294	$ 893	$ 0