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DERIVATIVE INSTRUMENTS - ADDITIONAL INFORMATION (Details) certificate in Thousands, $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Sep. 30, 2020 USD ($) certificate | Mar. 31, 2021 USD ($) certificate | Mar. 31, 2021 USD ($) certificate
Natural Gas Distribution |  |  |
Derivative [Line Items] |  |  |
Amortization of deferred hedge gains |  | $ 54 | $ 114
Treasury Lock | Natural Gas Distribution |  |  |
Derivative [Line Items] |  |  |
Amount of (losses) gains recognized in income on derivatives | $ (6,600) |  |
Foreign currency contracts |  |  |
Derivative [Line Items] |  |  |
Notional amount | $ 5,100 | $ 42 | $ 42
Physical commodity contracts | Energy Services |  |  |
Derivative [Line Items] |  |  |
Number of SRECs (in certificates) | certificate | 960 | 1,588 | 1,588
Debt Issued In September 2020 | Natural Gas Distribution |  |  |
Derivative [Line Items] |  |  |
Debt issued | $ 75,000 |  |
Home Services and Other |  |  |
Derivative [Line Items] |  |  |
Amortization of deferred hedge gains |  | $ 263 | $ 494
Home Services and Other | Treasury Lock |  |  |
Derivative [Line Items] |  |  |
Amount of (losses) gains recognized in income on derivatives | (13,700) |  |
Home Services and Other | Debt Issued In September 2020 |  |  |
Derivative [Line Items] |  |  |
Debt issued | 200,000 |  |
Home Services and Other | Debt Issued In July 2020 |  |  |
Derivative [Line Items] |  |  |
Debt issued | $ 260,000 |  |

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- Definition The amount of expense charged against earnings by an Entity to record deferred gains and losses on hedge instruments. Examples include gain on economic hedges, amortization of gain on designated fair value hedge and so forth. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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