Income (Loss) Per Share - Schedule of Basic and Diluted Income (Loss) Per Common Share from Continuing Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Net income (loss) from continuing operations applicable to common shares (numerator for basic and diluted calculation)	$ (13,298)	$ (44,944)
Weighted average number of common shares outstanding for basic income (loss) per share (in shares)	60,756,314	49,819,388
Weighted average number of potentially dilutive common shares outstanding (in shares)	0	0
Weighted average number of common shares outstanding for diluted income (loss) per share (in shares)	60,756,314	49,819,388
Income (loss) per common share from continuing operations:
Basic (in USD per share)	$ (0.22)	$ (0.90)
Diluted (in USD per share)	$ (0.22)	$ (0.90)