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Business Segments (Schedule Of Net Sales By Geographic Area) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |  |
Net Sales by Geographic Area, Total | [1],[2] | $ 936,295 | $ 1,029,444 | $ 927,647
United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales by Geographic Area, Total | [1] | 638,815 | 691,232 | 584,066
Exports From The United States | Asia |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales by Geographic Area, Total | [1] | 82,829 | 75,904 | 84,846
Exports From The United States | Canada |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales by Geographic Area, Total | [1] | 16,846 | 51,984 | 46,505
Exports From The United States | Europe |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales by Geographic Area, Total | [1] | 6,091 | 6,203 | 8,505
Exports From The United States | Latin America |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales by Geographic Area, Total | [1] | 13,735 | 12,106 | 15,199
Operations Outside The United States | Brazil |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales by Geographic Area, Total | [1] | 111,246 | 101,217 | 87,155
Operations Outside The United States | The Netherlands |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales by Geographic Area, Total | [1] | 35,871 | 45,667 | 54,380
Operations Outside The United States | Hungary |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales by Geographic Area, Total | [1] | 25,530 | 33,512 | 24,727
Operations Outside The United States | China |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales by Geographic Area, Total | [1] | 225 | 7,814 | 12,199
Operations Outside The United States | India |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales by Geographic Area, Total | [1] | $ 5,107 | $ 3,805 | $ 10,065
[1] | Information on exports and foreign operations are provided on the previous page. Cash and cash equivalents includes funds held in locations outside the U.S. of $23.0 million and $31.1 million at December 31, 2019 and 2018, respectively. Export sales relate almost entirely to PE Films. Operations outside the U.S. in The Netherlands, Hungary, China and India also relate to PE Films. Operations in Brazil are primarily related to Flexible Packaging Films, but also include PE Films operations. Sales from locations in The Netherlands and Hungary are primarily to customers located in Europe. Sales from locations in China (Guangzhou and Shanghai) are primarily to customers located in China, but also include other customers in Asia.
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