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LONG-TERM DEBT (Details Textual) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
May 18, 2017 USD ($) | Apr. 05, 2012 USD ($) | Dec. 31, 2018 | Dec. 31, 2017 USD ($) Ratio | Dec. 31, 2016 USD ($)
Long Term Debt [Line Items] |  |  |  |  |
Proceeds from non-current borrowings |  |  |  | $ 294.6 | $ 0.0
Bottom of range [member] |  |  |  |  |
Long Term Debt [Line Items] |  |  |  |  |
Maximum leverage ratio |  |  |  | 3.5 |
Top of range [member] |  |  |  |  |
Long Term Debt [Line Items] |  |  |  |  |
Maximum leverage ratio |  |  |  | 4.0 |
2022 Unsecured Notes [Member] |  |  |  |  |
Long Term Debt [Line Items] |  |  |  |  |
Proceeds from non-current borrowings |  | $ 500.0 |  |  |
Notional amount |  |  |  | $ 500.0 |
Borrowings, interest rate |  |  |  | 6.25% |
Minimum interest coverage ratio | Ratio |  |  |  | 2 |
Transaction Costs Capitalized |  |  |  | $ 9.9 |
2025 Unsecured Notes [member] |  |  |  |  |
Long Term Debt [Line Items] |  |  |  |  |
Proceeds from non-current borrowings | $ 294.6 |  |  | 300.0 |
Notional amount |  |  |  | $ 300.0 |
Borrowings, interest rate |  |  |  | 6.375% |
Interest Coverage Ratio |  |  |  | minimum interest coverage incurrence covenant of earnings before interest, taxes, depreciation, amortization, impairment, and other non-cash adjustments to interest of 2:1 |
Borrowings Redemption Premium |  |  |  | $ 5.3 |
Borrowing costs incurred |  |  |  | 10.7 |
Interest costs incurred |  |  |  | $ 2.8 |
Borrowings Redemption Price Percentage |  |  |  | 100.00% |
Credit Facility [member] |  |  |  |  |
Long Term Debt [Line Items] |  |  |  |  |
Proceeds from non-current borrowings |  |  |  | $ 230.0 |
Maximum leverage ratio |  |  |  | 4.0 |
Letters Of Credit Issued |  |  |  | $ 138.8 | $ 122.1
Increase Decrease The Capacity for Credit Facility |  |  |  | 400.0 |
Fee and commission expense |  |  |  | 3.9 |
Issued Letters of Credit Related to Discontinued Operations |  |  |  | $ 16.6 |
Credit Facility [member] | Bottom of range [member] |  |  |  |  |
Long Term Debt [Line Items] |  |  |  |  |
Maximum leverage ratio |  |  | 3.5 |  |
Standby fees on undrawn amounts under credit facility, Percentage |  |  |  | 0.45% |
Credit Facility Full Interest Rate |  |  |  | 1.00% |
Credit Facility [member] | Top of range [member] |  |  |  |  |
Long Term Debt [Line Items] |  |  |  |  |
Maximum leverage ratio |  |  | 4.0 |  |
Standby fees on undrawn amounts under credit facility, Percentage |  |  |  | 0.73% |
Credit Facility Full Interest Rate |  |  |  | 3.25% |

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- Definition The amount of interest and other costs that an entity incurs in connection with the borrowing of funds. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard -URIDate 2017-03-09 + Details
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