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Derivative financial instruments (Details) - USD ($) $ in Thousands | Jun. 20, 2023 | Sep. 30, 2023 | Mar. 20, 2023 | Dec. 31, 2022 | Sep. 20, 2022 | Jul. 19, 2019
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Amortizing interest rate swap June 2023 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Contract term | 3 years |  |  |  |  |
Notional amount |  | $ 287,901 |  |  |  |
Interest rate | 4.249% |  |  |  |  |
Fair value asset / (liability), other non-current assets |  | 3,201 |  |  |  |
Interest rate swap March 2023 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional amount |  |  | $ 200,000 |  |  |
Interest rate |  |  | 4.003% |  |  |
Fair value asset / (liability), other non-current assets |  | 3,964 |  |  |  |
Interest rate swap September 2022 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional amount |  |  |  |  | $ 300,000 |
Interest rate |  |  |  |  | 3.99% |
Fair value asset / (liability), other non-current assets |  | $ 5,837 |  | $ 2,409 |  |
Interest rate swap July 2019 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional amount |  |  |  |  |  | $ 200,000
Interest rate |  |  |  |  |  | 1.798%
Fair value asset / (liability), other current assets |  |  |  | $ 1,184 |  |

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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483466/210-20-50-3 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483466/210-20-50-3 + Details
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- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480237/815-40-50-5 + Details
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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-1B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-1A + Details
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- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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