Earnings (Loss) Per Common Share (Details Textual) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Class of Warrant or Right [Line Items]
Exercise price of warrant	$ 9.676
Earnings Loss Per Share (Textual) [Abstract]
Mandatory convertible preferred shares	20,900,000
Weighted average shares outstanding and dilutive potential common shares	469,000,000	508,200,000
Dividends declared	$ 0.10	$ 0.10
Scenario, Previously Reported [Member]
Class of Warrant or Right [Line Items]
Exercise price of warrant	$ 9.699
Series F Preferred Stock [Member] | Maximum [Member]
Class of Warrant or Right [Line Items]
Conversion rate of common stock to preferred stock	36.4596
Series F Preferred Stock [Member] | Maximum [Member] | Scenario, Previously Reported [Member]
Class of Warrant or Right [Line Items]
Conversion rate of common stock to preferred stock	36.036
Series F Preferred Stock [Member] | Minimum [Member]
Class of Warrant or Right [Line Items]
Conversion rate of common stock to preferred stock	29.8831
Series F Preferred Stock [Member] | Minimum [Member] | Scenario, Previously Reported [Member]
Class of Warrant or Right [Line Items]
Conversion rate of common stock to preferred stock	29.536