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INCOME TAXES (Reasons for difference and related tax effects) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Dec. 31, 2017
Jan. 01, 2017
Income Taxes [Abstract]      
Earnings before income taxes   $ 376,816 $ 351,838
Applicable tax rate   26.80% 26.80%
Income taxes at applicable statutory rate   $ 101,100 $ 94,398
Effect of different tax rates on earnings of foreign subsidiaries   (89,722) (83,208)
Income tax recovery and other adjustments related to prior taxation years   (1,676) (4,822)
Tax effect from change in tax rate $ (1,600) (1,633) 0
Tax Effect From Revaluation Of Deferred Tax Liabilities   (62,228) 0
Tax effect of tax losses   62,488 1,545
Effect of non-deductible expenses and other   6,153 (2,713)
Total income tax expense   $ 14,482 $ 5,200
Average effective tax rate   3.80% 1.50%