Fair Value of Financial Assets and Liabilities - Additional Information (Detail) (USD $)	12 Months Ended								12 Months Ended		0 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Amended Senior Term Facility [Member]	Dec. 31, 2012 Amended Senior Term Facility [Member]	Dec. 31, 2013 Alaska Facility [Member]	Dec. 31, 2012 Alaska Facility [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2012 Class A Preferred Stock [Member]	Dec. 31, 2011 Class A Preferred Stock [Member]	Jun. 21, 2013 IPO [Member]	Jun. 21, 2013 IPO [Member] Class A Preferred Stock [Member]	Dec. 31, 2013 IPO [Member] Class A Preferred Stock [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying value of Long term debt				$ 240,800,000	$ 133,300,000	$ 1,500,000	$ 2,000,000
Fair value of Long term debt				261,000,000
Common Stock Shares Issued											11,000,000	2,135,602	2,135,602
Initial Public Offering (IPO) price per share											$ 17.00
Value of liquidation preference	36,305,000	(9,640,000)	(58,740,000)						(9,640,000)	(25,650,000)		36,305,000	(36,305,000)
Fair value measurement related to derivative liabilities								$ 0