Quarterly Financial Information (Unaudited) - Summary of Unaudited Quarterly Results of Operations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Net revenues	$ 55,361	$ 44,330	$ 37,270	$ 48,284	$ 65,335	$ 92,673	$ 91,124	$ 85,921	$ 185,245	$ 335,053	$ 344,288
Gross profit	12,506	10,486	3,987	10,068	12,039	20,383	19,024	16,848	37,047	68,294	72,443
Net loss attributable to common shareholders	$ (4,446)	$ (8,832)	$ (17,415)	$ (8,981)	$ (21,306)	$ (5,093)	$ (7,892)	$ (9,122)	$ (39,674)	$ (43,413)	$ (89,266)
Earnings Per Share, Basic ($ per share)	$ (0.10)	$ (0.23)	$ (0.51)	$ (0.26)
Earnings Per Share, Diluted ($ per share)	$ (0.13)	$ (0.23)	$ (0.51)	$ (0.26)
Basic and diluted net loss per common share (dollars per share)					$ (0.63)	$ (0.15)	$ (0.23)	$ (0.27)	$ (1.05)	$ (1.28)	$ (2.72)