XML 169 R109.htm IDEA: XBRL DOCUMENT v3.8.0.1
INCOME AND MINING TAXES - Calculation of Expense by Applying Canadian Statutory Income Tax Rate (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Income and mining taxes expense calculated by applying the Canadian statutory income tax rate    
Combined federal and composite provincial tax rates 26.00% 26.00%
Expected income tax expense at statutory income tax rate $ 88,677 $ 69,666
Increase (decrease) in income and mining taxes resulting from:    
Mining taxes 40,886 33,949
Tax law changes   (1,557)
Impact of foreign tax rates (7,915) (9,370)
Permanent differences (5,275) 2,387
Impact of foreign exchange on deferred income tax balances (17,879) 14,562
Total income and mining taxes expense $ 98,494 $ 109,637