Stockholders' Equity (Narrative) (Details) (USD $)	9 Months Ended			1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended	0 Months Ended
	Jul. 10, 2011	Jul. 04, 2010	Oct. 03, 2010	Nov. 30, 2010 Stock Repurchase Authorization Program Expiring November 2011 [Member]	Jul. 10, 2011 Stock Repurchase Authorization Program Expiring November 2011 [Member]	May 31, 2011 Stock Repurchase Authorization Program Expiring November 2012 [Member]	Jul. 10, 2011 Stock Repurchase Authorization Program Expiring November 2012 [Member]	Jul. 31, 2011 Settled Post Close [Member]
Preferred stock, shares authorized	15,000,000		15,000,000
Preferred stock, par value	$ 0.01		$ 0.01
Preferred stock, shares issued	0		0
Repurchase of common stock, authorized amount				$ 100,000,000		$ 100,000,000
Stock repurchase program, expiration date				November 2011		November 2012
Common stock repurchased, shares					6,500,000			100,000
Common stock repurchased, aggregate cost	138,050,000	50,000,000			139,800,000			1,700,000
Aggregate remaining amount authorized for repurchase							$ 60,200,000