Summary Of Significant Accounting Policies (Schedule Of Basic And Diluted Income Per Common Share From Continuing Operations Calculations) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended																12 Months Ended
	Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2015		Jun. 30, 2014		Jun. 30, 2013
Accounting Policies [Abstract]
Income from continuing operations	$ 25,568		$ 20,403		$ 32,954		$ 22,761		$ 20,901		$ 18,900		$ 37,133		$ 24,052		$ 101,686		$ 100,986		$ 103,860
Income from continuing operations available to participating securities																	(143)		(174)		(326)
Income from continuing operations available to common shareholders																	$ 101,543		$ 100,812		$ 103,534
Weighted average common shares outstanding - basic (in shares)																	27,300		27,264		27,252
Incremental share effect from:
Nonparticipating restricted stock (in shares)																	3		3		3
Stock-settled stock appreciation rights (in shares)																	24		41		30
Weighted average common shares outstanding - diluted (in shares)																	27,327		27,308		27,285
Income per common share from continuing operations - basic (in dollars per share)																	$ 3.72		$ 3.70		$ 3.80
Income per common share from continuing operations - diluted (in dollars per share)	$ 0.93	[1]	$ 0.75	[1]	$ 1.20	[1]	$ 0.83	[1]	$ 0.76	[1]	$ 0.69	[1]	$ 1.36	[1]	$ 0.88	[1]	$ 3.72	[1]	$ 3.69	[1]	$ 3.79

[1] Diluted income (loss) per common share amounts are calculated independently for each of the quarters presented. Accordingly, the sum of the quarterly income (loss) per common share amounts may not agree with the fiscal year.