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Summary of significant accounting policies (Details) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2022 USD ($) segment | Dec. 31, 2021 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |
Number of operating segments | segment | 1 |
Number of reportable segments | segment | 1 |
Debt | $ 47,927,887 | $ 50,204,678
Floating rate debt |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Debt | 8,600,000 |
Floating rate debt | LIBOR |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Debt | 6,400,000 |
Long-term debt, maturity, after year one | 5,600,000 |
Derivative, notional amount | $ 4,200,000 |
Floating rate debt | One month LIBOR |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Long-term debt, floating rate, duration | 1 month |
Floating rate debt | Three month LIBOR |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Long-term debt, floating rate, duration | 3 months |
Floating rate debt | Six month LIBOR |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Long-term debt, floating rate, duration | 6 months |
Floating rate derivative | One month LIBOR |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Long-term debt, floating rate, duration | 1 month |
Floating rate derivative | Three month LIBOR |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Long-term debt, floating rate, duration | 3 months |
Floating rate derivative | Six month LIBOR |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Long-term debt, floating rate, duration | 6 months |

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- Definition Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI https://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69C -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69B -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1D -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8672-108599 + Details
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