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Derivative financial instruments - Schedule of fair value of derivative instruments (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Offsetting Liabilities [Line Items] |  |
Interest rate swaps - cash flow hedges, current liabilities | $ 46 | $ 1,401
Interest rate swaps - cash flow hedges, non current liabilities | 0 | 2,999
Net derivative assets (liabilities) | 200 | 4,400
Interest rate swaps - cash flow hedges |  |
Offsetting Liabilities [Line Items] |  |
Interest rate swaps - cash flow hedges, non current assets | 246 | 0
Interest rate swaps - cash flow hedges, current liabilities | (46) | (1,401)
Interest rate swaps - cash flow hedges, non current liabilities | $ 0 | $ (2,999)

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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