Equity and Earnings Per Share (Computation Of Basic And Diluted Earnings Per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		5 Months Ended	6 Months Ended	9 Months Ended		12 Months Ended
	Feb. 10, 2016	Mar. 31, 2016	Mar. 31, 2015	Oct. 31, 2014	Feb. 29, 2016	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015	Jun. 30, 2014	Sep. 15, 2015	Sep. 14, 2015	Jun. 02, 2014
Class of Stock [Line Items]
Preferred Stock, Shares Authorized		5,000,000				5,000,000		5,000,000
Preferred Stock, Par or Stated Value Per Share		$ 0.01				$ 0.01		$ 0.01
Preferred Stock, Shares Outstanding		0				0		0
Common Stock, Shares Authorized		150,000,000				150,000,000		150,000,000
Common Stock, Par or Stated Value Per Share		$ 0.01				$ 0.01		$ 0.01
Common Stock, Shares, Outstanding		52,800,000				52,800,000		55,200,000
Disclosure of Repurchase Agreements [Abstract]
PercentOfSharesReceivedUnderASR		80.00%
Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]
Net income attributable to common stock		$ 47,900	$ 37,700			$ 112,200	$ 113,600
Weighted average number of shares outstanding, used in computing basic earnings per share		52,900,000	54,900,000			53,700,000	54,800,000
Dilutive common stock equivalents		700,000	900,000			800,000	1,000,000
Weighted average number of shares outstanding used in computing diluted earnings per share		53,600,000	55,800,000			54,500,000	55,800,000
Basic earnings per share		$ 0.91	$ 0.69			$ 2.09	$ 2.07
Diluted earnings per share		$ 0.89	$ 0.68			$ 2.06	$ 2.04
Anti-dilutive options (excluded from the calculation of diluted earnings per share)		1,700,000	900,000			1,300,000	700,000
FY2016StockRepurchasePlan [Member] [Member] [Domain]
Disclosure of Repurchase Agreements [Abstract]
Stock Repurchase Program Authorized Amount										$ 200,000	$ 200,000
Treasury Stock, Shares, Acquired	900,000	2,300,000			3,200,000
Accelerated Share Repurchases, Final Price Paid Per Share		$ 62.92
Treasury Stock, Value, Acquired, Cost Method		$ 200,000
Accelerated Share Repurchases, Initial Price Paid Per Share		$ 70.35
FiscalYear2014StockRepurchasePlan [Member] [Member]
Disclosure of Repurchase Agreements [Abstract]
Stock Repurchase Program Authorized Amount												$ 150,000
Treasury Stock, Shares, Acquired		300,000		2,600,000				2,300,000
Treasury Stock, Value, Acquired, Cost Method								$ 150,000	$ 150,000
Accelerated Share Repurchases, Initial Price Paid Per Share				$ 57.03				$ 52.52