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v3.21.1

Segment Reporting Schedule of Revenue by Geographic Location (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Disaggregation of Revenue [Line Items] |  |
Sales | $ 178,599 | $ 185,261
UNITED STATES |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 132,897 | 134,985
PE Films |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 27,953 | 36,800
PE Films | Personal Care Materials [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 7,352 | 6,769
PE Films | Surface Protection Films [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 20,601 | 28,353
PE Films | Films For Other Markets [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 0 | 1,678
PE Films | Film Products Subtotal [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 27,953 | 36,800
Flexible Packaging Films [Member] [Domain] |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 32,521 | 30,574
Aluminum Extrusions [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 118,125 | 117,887
Aluminum Extrusions [Member] | Nonresidential Building And Construction [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 57,229 | 63,139
Aluminum Extrusions [Member] | Consumer Durables [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 13,152 | 12,549
Aluminum Extrusions [Member] | Distribution [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 7,516 | 7,738
Aluminum Extrusions [Member] | Automotive [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 11,415 | 9,471
Aluminum Extrusions [Member] | Residential Building And Construction [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 12,708 | 9,815
Aluminum Extrusions [Member] | Aluminum Extrusions Subtotal [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 118,125 | 117,887
Aluminum Extrusions [Member] | Machinery and Equipment BNL [Domain] |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 8,925 | 7,936
Aluminum Extrusions [Member] | Electrical [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 7,180 | 7,239
Exports From United States [Member] | Asia [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 13,362 | 22,064
Revenues | 6,900 | 9,300
Exports From United States [Member] | CANADA |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 5,434 | 4,629
Exports From United States [Member] | Europe [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 955 | 1,317
Exports From United States [Member] | Latin America [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Sales | 1,102 | 986
Operations Outside United States [Member] | BRAZIL |  |
Disaggregation of Revenue [Line Items] |  |
Sales | $ 24,849 | $ 21,280

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