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Fair value measurements (Carrying amounts and fair values of financial instruments) (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Assets |  |
Derivative assets, fair value | $ 10,383 | $ 3,303
Liabilities |  |
Derivative liabilities, fair value | 123,608 | 167,303
Carrying value |  |
Assets |  |
Cash and cash equivalents | 1,402,918 | 1,248,772
Restricted cash | 190,447 | 246,518
Investment, at fair value |  | 12,110
Derivative assets, fair value | 10,383 | 3,303
Assets, Carrying value | 1,603,748 | 1,510,703
Liabilities |  |
Debt | 28,302,330 | 28,934,904
Derivative liabilities, fair value | 123,608 | 167,303
Liabilities, Carrying value | 28,425,938 | 29,102,207
Fair value |  |
Assets |  |
Cash and cash equivalents | 1,402,918 | 1,248,772
Restricted cash | 190,447 | 246,518
Investment, at fair value |  | 12,110
Derivative assets, fair value | 10,383 | 3,303
Assets, Carrying value | 1,603,748 | 1,510,703
Liabilities |  |
Debt | 29,194,213 | 29,798,305
Derivative liabilities, fair value | 123,608 | 167,303
Liabilities, Carrying value | 29,317,821 | 29,965,608
Level 1 | Fair value |  |
Assets |  |
Cash and cash equivalents | 1,402,918 | 1,248,772
Restricted cash | 190,447 | 246,518
Investment, at fair value |  | 12,110
Derivative assets, fair value | 0 | 0
Assets, Carrying value | 1,593,365 | 1,507,400
Liabilities |  |
Debt | 0 | 0
Derivative liabilities, fair value | 0 | 0
Liabilities, Carrying value | 0 | 0
Level 2 | Fair value |  |
Assets |  |
Cash and cash equivalents | 0 | 0
Restricted cash | 0 | 0
Investment, at fair value |  |
Derivative assets, fair value | 10,383 | 3,303
Assets, Carrying value | 10,383 | 3,303
Liabilities |  |
Debt | 29,194,213 | 29,798,305
Derivative liabilities, fair value | 123,608 | 167,303
Liabilities, Carrying value | 29,317,821 | 29,965,608
Level 3 | Fair value |  |
Assets |  |
Cash and cash equivalents | 0 | 0
Restricted cash | 0 | 0
Investment, at fair value |  |
Derivative assets, fair value | 0 | 0
Assets, Carrying value | 0 | 0
Liabilities |  |
Debt | 0 | 0
Derivative liabilities, fair value | 0 | 0
Liabilities, Carrying value | $ 0 | $ 0

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 + 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. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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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