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LONG-TERM DEBT (Details Textual) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 05, 2012 | Dec. 31, 2018 | Dec. 31, 2017
Long Term Debt [Line Items] |  |  |
Proceeds from non-current borrowings |  | $ 0.0 | $ 294.6
Financing Initiation Cost |  | 0.6 |
Subsidiaries [Member] |  |  |
Long Term Debt [Line Items] |  |  |
Line Of Credit Maximum Borrowing Capacity Granted |  | 225.0 |
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% |
Transaction Costs Capitalized |  | $ 9.9 |
2025 Unsecured Notes [member] |  |  |
Long Term Debt [Line Items] |  |  |
Proceeds from non-current borrowings |  |  | $ 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 |
Borrowing costs incurred |  | $ 10.7 |
Borrowings Redemption Price Percentage |  | 100.00% |
Credit Facility [member] |  |  |
Long Term Debt [Line Items] |  |  |
Proceeds from non-current borrowings |  | $ 230.0 |
Standby fees on undrawn amounts under credit facility, Percentage |  | 0.73% | 0.73%
Letters Of Credit Issued |  | $ 110.8 | $ 138.8
Credit Facility Full Interest Rate |  | 3.25% | 3.25%
Increase Decrease The Capacity for Credit Facility |  | $ 400.0 |
Fee and commission expense |  | $ 3.8 |
Credit Facility [member] | Bottom of range [member] |  |  |
Long Term Debt [Line Items] |  |  |
Standby fees on undrawn amounts under credit facility, Percentage |  | 0.51% |
Credit Facility Full Interest Rate |  | 1.25% |
Credit Facility [member] | Top of range [member] |  |  |
Long Term Debt [Line Items] |  |  |
Standby fees on undrawn amounts under credit facility, Percentage |  | 0.84% |
Credit Facility Full Interest Rate |  | 3.75% |

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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 2018-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_7&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of expense relating to fees and commissions. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_85&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The cash inflow from non-current borrowings obtained. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2018-01-01 -Paragraph 17 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=para_17&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition Ratio of interest coverage incurrence convenant of earnings before interest, taxes, depreciation, amortisation, impairment, and other non-cash adjustments to interest. + References No definition available. + Details
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