v3.10.0.1

Corporate debt, Details of corporate debt (Details) $ in Thousands, € in Millions |  |  | 9 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
May 16, 2018 USD ($) | Dec. 22, 2014 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($) | Dec. 31, 2017 USD ($) | May 10, 2018 USD ($) | Jul. 20, 2017 USD ($) | Jul. 20, 2017 EUR (€) | Dec. 03, 2014 USD ($) | Nov. 17, 2014 USD ($)
Corporate debt [Abstract] |  |  |  |  |  |  |  |  |  |
Amount drawn |  |  | $ 73,767 | $ 287,051 |  |  |  |  |  |
Repayment of debt |  |  | $ 248,904 | $ 388,755 |  |  |  |  |  |
2019 Notes [Member] |  |  |  |  |  |  |  |  |  |
Corporate debt [Abstract] |  |  |  |  |  |  |  |  |  |
Senior notes issued |  |  |  |  |  |  |  |  |  | $ 255,000
Fixed interest rate |  |  |  |  |  |  |  |  |  | 7.00%
Maturity date |  |  | November 15, 2019 |  |  |  |  |  |  |
Former Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |
Corporate debt [Abstract] |  |  |  |  |  |  |  |  |  |
Credit facility amount |  |  |  |  |  |  |  |  | $ 125,000 |
Amount drawn |  | $ 125,000 |  |  |  |  |  |  |  |
Repayment of debt | $ 54,000 |  |  |  | $ 71,000 |  |  |  |  |
Eurodollar Rate Loans [Member] | LIBOR [Member] | Top of range [member] |  |  |  |  |  |  |  |  |  |
Corporate debt [Abstract] |  |  |  |  |  |  |  |  |  |
Adjustment to interest rate |  |  |  |  |  | 2.25% |  |  |  |
Eurodollar Rate Loans [Member] | LIBOR [Member] | Bottom of range [member] |  |  |  |  |  |  |  |  |  |
Corporate debt [Abstract] |  |  |  |  |  |  |  |  |  |
Adjustment to interest rate |  |  |  |  |  | 1.60% |  |  |  |
Base Rate Loans [Member] | Top of range [member] |  |  |  |  |  |  |  |  |  |
Corporate debt [Abstract] |  |  |  |  |  |  |  |  |  |
Adjustment to interest rate |  |  |  |  |  | 1.00% |  |  |  |
Base Rate Loans [Member] | Bottom of range [member] |  |  |  |  |  |  |  |  |  |
Corporate debt [Abstract] |  |  |  |  |  |  |  |  |  |
Adjustment to interest rate |  |  |  |  |  | 0.60% |  |  |  |
Base Rate Loans [Member] | Federal Funds Rate [Member] |  |  |  |  |  |  |  |  |  |
Corporate debt [Abstract] |  |  |  |  |  |  |  |  |  |
Adjustment to interest rate |  |  |  |  |  | 0.50% |  |  |  |
Base Rate Loans [Member] | LIBOR [Member] |  |  |  |  |  |  |  |  |  |
Corporate debt [Abstract] |  |  |  |  |  |  |  |  |  |
Adjustment to interest rate |  |  |  |  |  | 1.00% |  |  |  |
2017 Credit Facility [Member] |  |  |  |  |  |  |  |  |  |
Corporate debt [Abstract] |  |  |  |  |  |  |  |  |  |
Maturity date |  |  | July 20, 2019 |  |  |  |  |  |  |
2017 Credit Facility [Member] | Top of range [member] |  |  |  |  |  |  |  |  |  |
Corporate debt [Abstract] |  |  |  |  |  |  |  |  |  |
Credit facility amount |  |  |  |  |  |  | $ 11,700 | € 10 |  |
2017 Credit Facility [Member] | EURIBOR [Member] |  |  |  |  |  |  |  |  |  |
Corporate debt [Abstract] |  |  |  |  |  |  |  |  |  |
Adjustment to interest rate |  |  |  |  |  |  | 2.25% | 2.25% |  |
2017 Credit Facility [Member] | LIBOR [Member] |  |  |  |  |  |  |  |  |  |
Corporate debt [Abstract] |  |  |  |  |  |  |  |  |  |
Adjustment to interest rate |  |  |  |  |  |  | 2.25% | 2.25% |  |
New Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |
Corporate debt [Abstract] |  |  |  |  |  |  |  |  |  |
Maturity date |  |  | December 31, 2021 |  |  |  |  |  |  |
Credit facility amount |  |  | $ 70,000 |  |  | $ 215,000 |  |  |  |
Amount drawn |  |  | $ 58,000 |  |  |  |  |  |  |
New Revolving Credit Facility [Member] | Top of range [member] |  |  |  |  |  |  |  |  |  |
Corporate debt [Abstract] |  |  |  |  |  |  |  |  |  |
Credit facility amount |  |  |  |  |  | 300,000 |  |  |  |
Potential increase in borrowings capacity |  |  |  |  |  | $ 85,000 |  |  |  |

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- Definition The amount of increase in borrowing capacity under the credit facility the entity has the option to receive subject to the entity meeting certain conditions. + References No definition available. + Details
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- Definition The maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the credit facility. + References No definition available. + Details
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- Definition The amount of bonds issued by the entity. + 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 adjustment to the basis (reference rate) used for calculation of 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 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 maturity of 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 cash inflow from borrowings obtained. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2018-01-01 -Paragraph 17 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=para_17_c&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The cash outflow to settle borrowings, classified as financing activities. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2018-01-01 -Paragraph 17 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=para_17_d&doctype=Standard -URIDate 2018-03-16 + Details
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