Components of Calculation of Basic and Diluted Earnings Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014		Jun. 30, 2013
Earnings Per Share [Abstract]
Net Income (Loss) Attributable to Parent	$ (100,784)	$ (25,438)	$ (81,559)		$ (41,821)
Net loss	(100,784)	(25,438)	(81,559)		(41,821)
Less: Preferred stock dividends 1	(1,718)	(1,725)	(3,440)		(3,450)
Preferred Stock Conversions, Inducements	(3,368)	0	(3,368)		0
Loss attributable to common shareholders - Basic and Diluted	$ (105,870)	$ (27,163)	$ (88,367)		$ (45,271)
Weighted-average shares - Basic	66,514,000	62,899,000	66,065,000		59,141,000
Effect of dilutive securities	0	0	0	[1]	0	[1]
Weighted-average shares - Diluted	66,514,000	62,899,000	66,065,000		59,141,000
Preferred stock dividend rate			6.00%
Potentially dilutive securities with the effect of being anti-dilutive excluded from the calculation of diluted earnings per common share (less than 0.1 million for the 3 months ended March 31, 2012)	18,800,000	19,200,000	17,200,000		100,000

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