Earnings Per Share - Reconciliation of Numerators and Denominators Used in Computations of Both Basic and Diluted Earnings Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended
	Aug. 26, 2013	Mar. 31, 2014		Mar. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Reverse stock split ratio	0.5
Basic earnings (loss) per share computation:
Loss from continuing operations		$ (9,792)	[1]	$ (20,740)	[1]
Average common shares		94,398,665	[1],[2]	93,010,596	[1],[2]
Basic earnings (loss) per share from continuing operations (in dollars per share)		$ (0.10)	[2]	$ (0.22)	[2]
Diluted earnings (loss) per share computation:
Loss from continuing operations		$ (9,792)	[1]	$ (20,740)	[1]
Average common shares		94,398,665	[1],[2]	93,010,596	[1],[2]
Stock option conversion		0	[1],[3]	0	[1],[3]
Stock units		0	[1],[4]	0	[1],[4]
Average common shares — diluted		94,398,665	[2]	93,010,596	[2]
Diluted earnings (loss) per share from continuing operations (in dollars per share)		$ (0.10)	[2]	$ (0.22)	[2]
Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded		4,244,244		2,151,899
Stock Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded		297,726		544,486

[1] All applicable share data and per share amounts have been adjusted retroactively for the 1-for-2 reverse stock split effected on August 26, 2013.

[2] For the period ended March 31, 2013, basic and diluted earnings (loss) per common share and average basic and diluted shares outstanding have been adjusted retroactively to reflect a 1-for-2 reverse stock split effected August 26, 2013.

[3] Anti-dilutive common shares excluded 4,244,244 & 2,151,899

[4] Anti-dilutive stock units excluded 297,726 & 544,486