Business Segment Information (Net Sales To Major Customers) (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2018		Jun. 30, 2017		Jun. 30, 2016
Revenue, Major Customer [Line Items]
Net sales		$ 308,170	$ 296,174	$ 319,665	$ 298,916	$ 289,874	$ 293,834	$ 326,773	$ 291,361	$ 1,222,925	[1],[2]	$ 1,201,842	[1],[2]	$ 1,191,109	[1],[2]
Retail [Member]
Revenue, Major Customer [Line Items]
Net sales	[1],[2]									650,234		641,417		619,384
Retail [Member] | Walmart Inc. [Member]
Revenue, Major Customer [Line Items]
Net sales										$ 209,860		$ 201,484		$ 189,417
Retail [Member] | Customer Concentration Risk [Member] | Walmart Inc. [Member]
Revenue, Major Customer [Line Items]
Net sales as a percentage of consolidated net sales										17.00%		17.00%		16.00%
Foodservice [Member]
Revenue, Major Customer [Line Items]
Net sales	[1],[2]									$ 572,691		$ 560,425		$ 571,725
Foodservice [Member] | McLane Company Inc [Member]
Revenue, Major Customer [Line Items]
Net sales										$ 185,226		$ 198,153		$ 232,241
Foodservice [Member] | Customer Concentration Risk [Member] | McLane Company Inc [Member]
Revenue, Major Customer [Line Items]
Net sales as a percentage of consolidated net sales										15.00%		16.00%		19.00%

[1] All intercompany transactions have been eliminated.

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