Summary of Significant Accounting Policies - Interest Cost Capitalized and Incurred (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]
Interest incurred	$ 2,626	$ 1,064	$ 1,233
Interest capitalized	382	365	513
Interest expense	$ 2,244	$ 699	$ 720