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v3.20.4

Segment Information (Schedule Of Revenue And Long-Lived Assets, By Geographical Areas) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 620,302 | $ 590,214 | $ 568,959 | $ 592,703 | $ 621,787 | $ 618,264 | $ 627,533 | $ 596,117 | $ 2,372,178 | $ 2,463,701 | $ 2,457,914
Long-lived assets | 1,543,258 |  |  |  | 1,526,276 |  |  |  | 1,543,258 | 1,526,276 | 1,487,562
United States |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 2,144,105 | 2,191,560 | 2,145,098
Long-lived assets | 1,506,862 |  |  |  | 1,487,591 |  |  |  | 1,506,862 | 1,487,591 | 1,452,532
Mexico |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 149,438 | 197,470 | 233,116
Long-lived assets | 36,222 |  |  |  | 38,428 |  |  |  | 36,222 | 38,428 | 34,741
Other |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 78,635 | 74,671 | 79,700
Long-lived assets | 174 |  |  |  | 257 |  |  |  | 174 | 257 | 289
Total Foreign Countries [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 228,073 | 272,141 | 312,816
Long-lived assets | $ 36,396 |  |  |  | $ 38,685 |  |  |  | $ 36,396 | $ 38,685 | $ 35,030

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