Stockholders' Equity (Dividends Information) (Details) (USD $)	0 Months Ended	3 Months Ended						6 Months Ended	12 Months Ended
	Jul. 11, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Jun. 30, 2011	Dec. 31, 2010
Stockholders' Equity
Dividends paid per share		$ 0.13	$ 0.25	$ 0.21	$ 0.21	$ 0.00	$ 0.20		$ 0.62
Dividends declared per share	$ 0.13
Dividend paid and declared per share								$ 0.51