Equity (Details)				12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011	Dec. 31, 2012 Common Stock [Member]	Jan. 31, 2008 Common Stock [Member]	Apr. 20, 2009 Preferred Stock [Member]
Class of Stock [Line Items]
Number of shares authorized to be repurchased					500,000
Stock repurchased during the period, shares				0
Number of remaining shares authorized to be repurchased				500,000
Preferred stock, shares authorized	200,000		200,000			200,000
Preferred stock, shares issued	0	0	0