Business Segment Information (Net Sales To Major Customers) (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020		Jun. 30, 2019		Jun. 30, 2018
Revenue, Major Customer [Line Items]
Net sales		$ 320,854	$ 321,363	$ 355,117	$ 337,054	$ 323,670	$ 317,882	$ 349,581	$ 316,654	$ 1,334,388	[1],[2]	$ 1,307,787	[1],[2]	$ 1,222,925	[1],[2]
Retail [Member]
Revenue, Major Customer [Line Items]
Net sales	[1],[2]									714,127		656,621		650,234
Retail [Member] | Walmart Inc. [Member]
Revenue, Major Customer [Line Items]
Net sales										$ 241,699		$ 222,171		$ 209,860
Retail [Member] | Customer Concentration Risk [Member] | Walmart Inc. [Member]
Revenue, Major Customer [Line Items]
Net sales as a percentage of consolidated net sales										18.00%		17.00%		17.00%
Foodservice [Member]
Revenue, Major Customer [Line Items]
Net sales	[1],[2]									$ 620,261		$ 651,166		$ 572,691
Foodservice [Member] | McLane Company Inc [Member]
Revenue, Major Customer [Line Items]
Net sales										$ 174,242		$ 195,907		$ 185,226
Foodservice [Member] | Customer Concentration Risk [Member] | McLane Company Inc [Member]
Revenue, Major Customer [Line Items]
Net sales as a percentage of consolidated net sales										13.00%		15.00%		15.00%

[1] All intercompany transactions have been eliminated.

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