Selected Quarterly Financial Data (Schedule Of Quarterly Financial Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Jun. 30, 2019		Mar. 31, 2019		Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2017		Sep. 30, 2017		Jun. 30, 2019		Jun. 30, 2018		Jun. 30, 2017
Quarterly Financial Information Disclosure [Abstract]
Net Sales	$ 323,670		$ 317,882		$ 349,581		$ 316,654		$ 308,170		$ 296,174		$ 319,665		$ 298,916		$ 1,307,787	[1],[2]	$ 1,222,925	[1],[2]	$ 1,201,842	[1],[2]
Gross Profit	78,210		75,397		91,392		81,199		76,181		67,911		83,939		75,475		326,198		303,506		318,780
Net Income	$ 33,010	[3],[4]	$ 30,604		$ 47,907	[4]	$ 39,028		$ 32,387		$ 27,621		$ 45,920	[5]	$ 29,386		$ 150,549	[3],[4]	$ 135,314	[5]	$ 115,314
Diluted Net Income Per Common Share (in dollars per share)	$ 1.20	[3],[4],[6]	$ 1.11	[6]	$ 1.73	[4],[6]	$ 1.42	[6]	$ 1.18	[6]	$ 1.00	[6]	$ 1.67	[5],[6]	$ 1.07	[6]	$ 5.46	[3],[4],[6]	$ 4.92	[5],[6]	$ 4.20
Fair Value Adjustment [Member]
Interim Period, Costs Not Allocable [Line Items]
Quarterly charges and (credits), amount affecting comparability	$ (5,700)				$ (7,400)												$ (13,100)
Quarterly charges and (credits), per share amount affecting comparability (in dollars per share)	$ (0.21)				$ (0.27)												$ (0.48)
ERP Expenses [Member]
Interim Period, Costs Not Allocable [Line Items]
Quarterly charges and (credits), amount affecting comparability	$ 1,400																$ 1,400
Quarterly charges and (credits), per share amount affecting comparability (in dollars per share)	$ 0.05																$ 0.05
Restructuring and Impairment Charges [Member]
Interim Period, Costs Not Allocable [Line Items]
Quarterly charges and (credits), amount affecting comparability	$ 1,300																$ 1,300
Quarterly charges and (credits), per share amount affecting comparability (in dollars per share)	$ 0.05																$ 0.05
Deferred Tax Benefit Resulting From Tax Rate Change [Member]
Interim Period, Costs Not Allocable [Line Items]
Quarterly charges and (credits), amount affecting comparability													$ (8,900)						$ (9,500)
Quarterly charges and (credits), per share amount affecting comparability (in dollars per share)													$ (0.32)						$ (0.35)

[1] All intercompany transactions have been eliminated.

[2] Net sales and long-lived assets are predominately domestic.

[3] 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.

[4] 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.

[5] 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.

[6] 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.