Capitalized Interest - Summary of Interest Costs Incurred, Capitalized, Expensed and Charged to Cost of Sales (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Interest Costs Incurred [Abstract]
Interest capitalized, beginning of period	$ 3,294	$ 893
Interest incurred	6,223	6,250
Interest charged to interest expense	(5,794)	(5,566)
Interest charged to cost of sales	(105)
Interest capitalized, end of period	$ 3,618	$ 1,577