CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY [Parenthetical] (USD $)	3 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Dividends and distributions declared (in dollars per share)	$ 0.40	$ 0.40	$ 1.60	$ 1.60	$ 2.04