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		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Accounting Policies [Abstract]
Income from continuing operations	$ 18,900	$ 20,733	$ 80,085	$ 78,459
Income from continuing operations available to participating securities	(21)	(28)	(139)	(312)
Income from continuing operations available to common shareholders	$ 18,879	$ 20,705	$ 79,946	$ 78,147
Weighted average common shares outstanding - basic (in shares)	27,261	27,259	27,258	27,244
Incremental share effect from:
Nonparticipating restricted stock (in shares)	2	2	3	3
Stock-settled stock appreciation rights (in shares)	34	26	42	28
Weighted average common shares outstanding - diluted (in shares)	27,297	27,287	27,303	27,275
Income per common share from continuing operations - basic and diluted (in dollars per share)	$ 0.69	$ 0.76	$ 2.93	$ 2.87