CONSOLIDATED STATEMENT OF CHANGES IN EQUITY Parenthetical (USD $)	6 Months Ended
	Jun. 30, 2011
Statement of Stockholders' Equity Parenthetical [Abstract]
Common dividends declared - $1.04 per share	$ 1.04
Issuance of 4,750 shares of common stock, options exercised	4,750
Issuance of 2,860 shares of common stock, dividend reinvestment plan	2,860
Withheld 3,564 shares of common stock to satisfy tax withholding obligations in connection with the vesting of restricted stock	3,564