CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Statement of Stockholders' Equity [Abstract]
Common stock dividends paid, per share	$ 0.1125	$ 0.225	$ 0.225
Preferred stock dividends declared per share	$ 146.47