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Long-term investments - Schedule of Long-Term Investments (Detail) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Schedule of Equity Method Investments [Line Items] |  |
Investments carried at fair value | $ 1,417,524 | $ 1,294,147
Noncontrolling interest in partnerships and joint ventures | 119,798 | 83,497
Other | 4,939 | 2,267
Total other long-term investments | 227,871 | 121,968
Notes Receivable | Development loans |  |
Schedule of Equity Method Investments [Line Items] |  |
Development loans receivable from equity-method investees | 103,134 | 36,204
Atlantica |  |
Schedule of Equity Method Investments [Line Items] |  |
Investments carried at fair value | 1,307,814 | 1,178,581
Atlantica Yield Energy Solutions Canada Inc. |  |
Schedule of Equity Method Investments [Line Items] |  |
Investments carried at fair value | 83,060 | 88,494
San Antonio Water System |  |
Schedule of Equity Method Investments [Line Items] |  |
Investments carried at fair value | $ 26,650 | $ 27,072

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- Definition Amount, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919230-210447 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 + Details
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