CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Unaudited) (Parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2011
CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Unaudited) (Parenthetical) [Abstract]
Common dividends declared per share (in dollars per share)	$ 0.225
Preferred dividends declared per share (in dollars per share)	$ 1.500
Issuance of Series D Preferred Stock (in shares)	1,046,400
Shares issued in lieu of Directors' fees (in shares)	17,636
Shares of restricted stock withheld to satisfy tax withholding obligations on vesting of restricted stock (in shares)	18,819
Shares of deferred incentive share units withheld to satisfy tax withholding obligations on vesting of DISUs (in shares)	11
Distribution of shares of common stock from deferred compensation plan (in shares)	48,125
Contribution of shares of common stock to deferred compensation plan (in shares)	2,061