Consolidated Statement of Equity (Unaudited) (Parentheticals) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Statement of Stockholders' Equity (Unaudited)
Per shares distributions declared	$ 0.840	$ 0.567	$ 1.660	$ 1.132	$ 2.44