Subsequent Events (Details) (USD $) In Thousands, except Share data in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Nov. 04, 2011	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Subsequent Event
Treasury Stock, Shares, Acquired		2.2	0	2.2	0
Repurchases of Common Stock	$ 769	$ 28,875		$ 28,875	$ 0
Repurchase of Equity [Member]
Subsequent Event
Treasury Stock, Shares, Acquired	1.2
Repurchases of Common Stock	$ 16,400