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SIGNIFICANT ACCOUNTING POLICIES (Textual) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Basis of Presentation [Line Items] |  |  |  |  |  |
Percentage Net Sales Over Time |  |  |  | 10.00% |  |
Operating Income (Loss) |  |  |  | $ 370,910 | $ 375,539 | $ 376,942
Selling, general & administrative expenses |  |  |  | 621,489 | 627,697 | 541,225
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment | $ (1,696) | $ (4,232) | $ (758) |  |  |
Income Tax Reconciliation Excess Tax Benefits Stock Options |  |  |  | $ 3,451 | $ 1,094 | $ 6,276
Percentage of LIFO Inventory | 37.00% |  |  | 36.00% | 37.00% | 32.00%
Maximum period for which derivative contracts cover currency and commodity exposures (in years) |  |  |  | 3 years |  |
Product Warranties |  |  |  |  |  |
Period of warranty services (in years) |  |  |  | 3 years |  |
Stock-Based Compensation |  |  |  |  |  |
Anti-dilutive shares excluded from the calculation of diluted earnings per share (in shares) |  |  |  | 524,110 | 324,688 | 157,033
Research and Development |  |  |  |  |  |
Research and development costs |  |  |  | $ 56,845 | $ 54,168 | $ 47,899
Bonus |  |  |  |  |  |
Costs related to the Company's discretionary employee bonus programs |  |  |  | 100,381 | 123,799 | $ 97,392
Inventories |  |  |  |  |  |
Inventory Valuation Reserves | $ 24,502 |  |  | 24,088 | 24,502 |
Prepaid Expense, Current [Abstract] |  |  |  |  |  |
Prepaid Expense, Current | $ 17,078 |  |  | $ 17,437 | $ 17,078 |

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