Business Segment Information (Net Sales To Major Customers) (Details) - USD ($) $ 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
Revenue, Major Customer [Line Items]
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]
Retail [Member]
Revenue, Major Customer [Line Items]
Net sales	[1],[2]									656,621		650,234		641,417
Retail [Member] | Walmart Inc. [Member]
Revenue, Major Customer [Line Items]
Net sales										$ 222,171		$ 209,860		$ 201,484
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%		17.00%
Foodservice [Member]
Revenue, Major Customer [Line Items]
Net sales	[1],[2]									$ 651,166		$ 572,691		$ 560,425
Foodservice [Member] | McLane Company Inc [Member]
Revenue, Major Customer [Line Items]
Net sales										$ 195,907		$ 185,226		$ 198,153
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%		15.00%		16.00%

[1] All intercompany transactions have been eliminated.

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