Computation of net income (loss) per common share ("EPS"), basic and diluted (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Net Income (Loss) Attributable to Parent	$ 48,408	$ 10,132
Preferred Stock Dividends Income Statement Impact	(931)	(930)
Net income (loss) applicable to common stock	47,477	9,202
Weighted Average Number Of Shares Outstanding Basic	1,023,418,052	1,021,536,201
Weighted Average Number Diluted Shares Outstanding Adjustment	1,526,948	802,894
Average common shares outstanding - assuming dilution	1,024,945,000	1,022,339,095
Basic and dilutive EPS	$ 0.05	$ 0.01
Retained Earnings Member
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Net Income (Loss) Attributable to Parent	$ 48,408	$ 10,132