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Gains (losses) from operating activities in the statement of income, included according to their nature (Details 1) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Statement [Line Items] |  |  |
Revenue | $ 1,817,191 | $ 1,943,655 | $ 2,265,803
Specialty plant nutrition [Member] |  |  |
Statement [Line Items] |  |  |
Revenue | 701,688 | 723,920 | 781,751
Sodium Nitrates [Member] |  |  |
Statement [Line Items] |  |  |
Revenue | 18,291 | 20,679 | 17,688
Potassium Nitrate And Sodium Potassium Nitrate [Member] |  |  |
Statement [Line Items] |  |  |
Revenue | 424,041 | 457,477 | 527,945
Specialty Blends [Member] |  |  |
Statement [Line Items] |  |  |
Revenue | 163,033 | 153,739 | 145,511
Other Specialty Fertilizers [Member] |  |  |
Statement [Line Items] |  |  |
Revenue | 96,323 | 92,025 | 90,607
Iodine And Derivatives [Member] |  |  |
Statement [Line Items] |  |  |
Revenue | 334,657 | 371,020 | 324,972
Lithium and Derivatives [Member] |  |  |
Statement [Line Items] |  |  |
Revenue | 383,373 | 505,714 | 734,801
Potassium [Member] |  |  |
Statement [Line Items] |  |  |
Revenue | 209,294 | 212,151 | 267,474
Industrial chemicals [Member] |  |  |
Statement [Line Items] |  |  |
Revenue | 160,608 | 94,875 | 108,267
Other Products [Member] |  |  |
Statement [Line Items] |  |  |
Revenue | 27,571 | 35,975 | 48,538
Income From Services [Member] |  |  |
Statement [Line Items] |  |  |
Revenue | 3,241 | 3,410 | 4,017
Income From leasing Of Properties [Member] |  |  |
Statement [Line Items] |  |  |
Revenue | 1,457 | 1,438 | 1,474
Income from subleases on right-of-use assets [Member] |  |  |
Statement [Line Items] |  |  |
Revenue | 176 | 261 | 0
Commodities [Member] |  |  |
Statement [Line Items] |  |  |
Revenue | 11,938 | 16,176 | 18,581
Other Ordinary Income Commercial Offices [Member] |  |  |
Statement [Line Items] |  |  |
Revenue | $ 10,759 | $ 14,690 | $ 24,466

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