Repurchases Of Common Stock (Details) (USD $)	1 Months Ended	12 Months Ended						12 Months Ended	1 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended	1 Months Ended
	Mar. 31, 2011	Jun. 30, 2013	Jun. 30, 2011	Aug. 31, 2012	Jun. 30, 2012	Aug. 31, 2011	Aug. 31, 2010	Jun. 30, 2013 Previous Maturity Date Of Stock Repurchase Program [Member]	Nov. 30, 2010 Common Stock Repurchase Program [Member]	Jun. 30, 2013 Common Stock Repurchase Program [Member]	Nov. 30, 2010 Additional Authorization Under Common Stock Repurchase Program [Member]	Jun. 30, 2013 Treasury Method [Member]	Mar. 31, 2011 Share-Based Compensation Tax Withholding [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount									$ 80,000,000		$ 40,000,000
Stock repurchase program, maturity date								Nov. 30, 2012		Nov. 30, 2014
Common stock repurchased, shares		4,686,094			4,353,200					4,362,095		332,894
Average price of common stock repurchased										$ 18.32		$ 38.77
Cost of common stock repurchased		87,776,000			74,871,000					79,900,000		12,900,000
Stock repurchase program, remaining amount										40,100,000
Repurchase of common stock		12,905,000	13,758,000
Restricted stock vested	343,800
Shares withheld to satisfy tax withholding obligations													121,908
Fair market value per share				$ 45.95		$ 31.78	$ 16.15						$ 28.08
Cost to satisfy minimum statutory withholding requirements													$ 3,400,000