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Business Segment Information (Net Sales To Major Customers) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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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.

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