CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Unaudited) (Parenthetical) (USD $)	6 Months Ended
	Jun. 30, 2011
Statement of Stockholders' Equity [Abstract]
Common dividends declared, per share (in dollars per share)	$ 0.150
Preferred dividends declared, per share (in dollars per share)	$ 1.000
Issuance of Series D Preferred Stock (in shares)	1,046,400
Shares issued in lieu of Directors' Fees (in shares)	15,027
Shares of restricted stock withheld to satisfy tax withholding obligations on vesting of restricted stock (in shares)	16,688
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