Summary Of Significant Accounting Policies (Schedule Of Basic And Diluted Income Per Common Share From Continuing Operations Calculations) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2012
Accounting Policies [Abstract]
Income from continuing operations	$ 20,901		$ 18,900		$ 37,133		$ 24,052		$ 25,401		$ 20,733		$ 31,471		$ 26,255		$ 100,986		$ 103,860		$ 92,349
Income from continuing operations available to participating securities																	(174)		(326)		(170)
Income from continuing operations available to common shareholders																	$ 100,812		$ 103,534		$ 92,179
Weighted average common shares outstanding - basic (in shares)																	27,264		27,252		27,233
Incremental share effect from:
Nonparticipating restricted stock (in shares)																	3		3		4
Stock-settled stock appreciation rights (in shares)																	41		30		28
Weighted average common shares outstanding - diluted (in shares)																	27,308		27,285		27,265
Income per common share from continuing operations - basic (in dollars per share)																	$ 3.70		$ 3.80		$ 3.38
Income per common share from continuing operations - diluted (in dollars per share)	$ 0.76	[1]	$ 0.69	[1]	$ 1.36	[1]	$ 0.88	[1]	$ 0.93	[1]	$ 0.76	[1]	$ 1.14	[1]	$ 0.96	[1]	$ 3.69	[1]	$ 3.79	[1]	$ 3.38

[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.