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EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Schedule of Employee Benefit Plans [Line Items] |  |  |
Postemployment Benefits, Period Expense | $ 5.5 | $ 8.3 |
Deferred Compensation Liability, Classified, Noncurrent | $ 22.4 |  | $ 21.7
CANADA | Minimum [Member] |  |  |
Schedule of Employee Benefit Plans [Line Items] |  |  |
Defined Contribution Plan Employer Matching Contribution Percent | 3.00% |  |
CANADA | Maximum [Member] |  |  |
Schedule of Employee Benefit Plans [Line Items] |  |  |
Defined Contribution Plan Employer Matching Contribution Percent | 5.00% |  |
UNITED STATES |  |  |
Schedule of Employee Benefit Plans [Line Items] |  |  |
Defined Contribution Plan Employer Matching Contribution Percent | 50.00% |  |
Defined Contribution Plan Maximum Annual Contribution Per Employee Percent | 6.00% |  |

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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer). + References No definition available. + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
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- Definition Schedule of Employee Benefit Plans [Line Items] + References No definition available. + Details
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- Details
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- Details
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