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Note 1 - Segment Information - Geographical Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Statement Line Items [Line Items] |  |  |
Net sales | $ 5,288,504 | $ 4,293,592 | $ 6,903,123
Total assets | 14,398,218 | 14,003,275 |
Trade receivables, net | 1,214,060 | 954,685 |
Property, plant and equipment, net | 6,229,143 | 6,001,939 |
Capital expenditures | 558,236 | 786,873 | 1,131,519
Continuing operations [member] |  |  |
Statement Line Items [Line Items] |  |  |
Net sales | 5,288,504 | 4,293,592 | 6,903,123
Total assets | 14,398,218 | 13,851,858 | 14,799,545
Trade receivables, net | 1,214,060 | 954,685 | 1,107,189
Property, plant and equipment, net | 6,229,143 | 6,001,939 | 5,626,602
Capital expenditures | 558,092 | 784,962 | 1,130,313
Depreciation and amortization | 608,640 | 657,109 | 653,313
Discontinued operations [member] |  |  |
Statement Line Items [Line Items] |  |  |
Net sales | 11,899 | 234,911 | 197,630
Total assets |  | 151,417 | 87,429
Trade receivables, net |  | 33,620 | 27,940
Property, plant and equipment, net |  | 41,470 | 45,656
Capital expenditures | 145 | 1,911 | 1,206
Depreciation and amortization |  | 5,303 | 5,465
North America [member] | Continuing operations [member] |  |  |
Statement Line Items [Line Items] |  |  |
Net sales | 2,451,357 | 1,320,297 | 2,668,724
Total assets | 7,925,520 | 7,467,842 | 8,625,806
Trade receivables, net | 582,204 | 229,390 | 339,499
Property, plant and equipment, net | 3,914,229 | 3,652,032 | 3,207,661
Capital expenditures | 430,143 | 646,545 | 822,396
Depreciation and amortization | 354,091 | 381,811 | 385,189
South America [member] | Continuing operations [member] |  |  |
Statement Line Items [Line Items] |  |  |
Net sales | 1,142,142 | 1,210,527 | 2,132,221
Total assets | 2,975,599 | 2,803,848 | 2,931,297
Trade receivables, net | 234,877 | 204,746 | 396,834
Property, plant and equipment, net | 1,190,145 | 1,237,391 | 1,269,995
Capital expenditures | 58,949 | 59,780 | 168,140
Depreciation and amortization | 126,273 | 128,458 | 125,754
Europe [member] | Continuing operations [member] |  |  |
Statement Line Items [Line Items] |  |  |
Net sales | 545,777 | 565,173 | 728,815
Total assets | 2,002,658 | 1,925,784 | 1,877,429
Trade receivables, net | 214,944 | 161,291 | 181,084
Property, plant and equipment, net | 878,788 | 847,318 | 907,466
Capital expenditures | 57,285 | 35,270 | 82,344
Depreciation and amortization | 93,900 | 113,875 | 112,742
Middle East and Africa [member] | Continuing operations [member] |  |  |
Statement Line Items [Line Items] |  |  |
Net sales | 937,439 | 1,055,994 | 1,096,688
Total assets | 391,029 | 593,649 | 429,317
Trade receivables, net | 135,524 | 308,919 | 137,278
Property, plant and equipment, net | 102,481 | 106,941 | 86,181
Capital expenditures | 7,562 | 24,166 | 36,867
Depreciation and amortization | 12,094 | 11,053 | 9,912
Asia Pacific [member] | Continuing operations [member] |  |  |
Statement Line Items [Line Items] |  |  |
Net sales | 211,789 | 141,601 | 276,675
Total assets | 441,546 | 482,132 | 423,479
Trade receivables, net | 46,511 | 50,339 | 52,494
Property, plant and equipment, net | 143,500 | 158,257 | 155,299
Capital expenditures | 4,153 | 19,201 | 20,566
Depreciation and amortization | 22,282 | 21,912 | 19,716
Unallocated region [member] | Continuing operations [member] |  |  |
Statement Line Items [Line Items] |  |  |
Net sales |  |  |
Total assets | 661,866 | 578,603 | 512,217
Trade receivables, net |  |  |
Property, plant and equipment, net |  |  |
Capital expenditures |  |  |
Depreciation and amortization |  |  |

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