Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Jun. 30, 2018		Jun. 30, 2017		Jun. 30, 2016
Income Statement [Abstract]
Net Sales	[1],[2]	$ 1,222,925		$ 1,201,842		$ 1,191,109
Cost of Sales		919,412		883,078		891,480
Gross Profit		303,513		318,764		299,629
Selling, General and Administrative Expenses		131,406		126,381		115,059
Multiemployer Pension Settlement and Related Costs		0		17,635		0
Operating Income	[1]	172,107		174,748		184,570
Other, Net		2,096		768		63
Income Before Income Taxes		174,203		175,516		184,633
Taxes Based on Income		38,889		60,202		62,869
Net Income		$ 135,314	[3]	$ 115,314	[4]	$ 121,764
Net Income Per Common Share:
Basic (in dollars per share)		$ 4.93		$ 4.21		$ 4.45
Diluted (in dollars per share)		$ 4.92	[3],[5]	$ 4.20	[4],[5]	$ 4.44
Weighted Average Common Shares Outstanding:
Basic (in shares)		27,403		27,376		27,336
Diluted (in shares)		27,459		27,440		27,373

[1] All intercompany transactions have been eliminated.

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

[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] Included in the third quarter and fiscal year net income was expense of $11.5 million, net of taxes, or approximately $0.42 per diluted share, related to a multiemployer pension settlement and other benefit-related costs.

[5] 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.