Summary Of Significant Accounting Policies (Schedule Of Basic And Diluted Net Income Per Common Share Calculations) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended																12 Months Ended
	Jun. 30, 2019	[1],[2]	Mar. 31, 2019		Dec. 31, 2018	[2]	Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2017	[3]	Sep. 30, 2017		Jun. 30, 2019		Jun. 30, 2018		Jun. 30, 2017
Accounting Policies [Abstract]
Net income	$ 33,010		$ 30,604		$ 47,907		$ 39,028		$ 32,387		$ 27,621		$ 45,920		$ 29,386		$ 150,549	[1],[2]	$ 135,314	[3]	$ 115,314
Net income available to participating securities																	(259)		(271)		(196)
Net income available to common shareholders																	$ 150,290		$ 135,043		$ 115,118
Weighted average common shares outstanding - basic (in shares)																	27,438		27,403		27,376
Incremental share effect from:
Nonparticipating restricted stock (in shares)																	2		3		3
Stock-settled stock appreciation rights (in shares)																	97		53		61
Weighted average common shares outstanding - diluted (in shares)																	27,537		27,459		27,440
Net income per common share - basic (in dollars per share)																	$ 5.48		$ 4.93		$ 4.21
Net income per common share - diluted (in dollars per share)	$ 1.20	[4]	$ 1.11	[4]	$ 1.73	[4]	$ 1.42	[4]	$ 1.18	[4]	$ 1.00	[4]	$ 1.67	[4]	$ 1.07	[4]	$ 5.46	[1],[2],[4]	$ 4.92	[3],[4]	$ 4.20

[1] Included in the fourth quarter and fiscal year net income were after-tax ERP expenses of $1.4 million, or approximately $0.05 per diluted share, and after-tax restructuring and impairment charges of $1.3 million, or approximately $0.05 per diluted share.

[2] Included in the second quarter and fourth quarter net income was an after-tax benefit of $7.4 million and $5.7 million, respectively, or approximately $0.27 and $0.21 per diluted share, respectively, related to the reduction in the fair value of Angelic’s contingent consideration liability. The after-tax benefit for the fiscal year was $13.1 million, or approximately $0.48 per diluted share.

[3] Included in the second quarter net income was the one-time preliminary deferred tax benefit of $8.9 million, or approximately $0.32 per diluted share, resulting from the Tax Act. The fiscal year impact was $9.5 million, or approximately $0.35 per diluted share.

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