Stockholders' Equity (Narrative) (Details) (USD $) Share data in Millions, unless otherwise specified	4 Months Ended		22 Months Ended	24 Months Ended
	Jan. 20, 2013	Jan. 22, 2012	Nov. 15, 2014	Nov. 15, 2014	Nov. 17, 2013 Stock Repurchase Authorization Program Expiring November 2013 [Member]
Equity, Class of Treasury Stock [Line Items]
Repurchase of common stock, authorized amount				$ 100,000,000	$ 100,000,000
Treasury Stock, Shares, Acquired	1.0
Repurchase of common stock, remaining authorized amount			150,000,000
Repurchases of common stock	$ (26,888,000)	$ (6,901,000)