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Rates and Other Regulatory Activities - Additional Information (Detail) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 USD ($) Dekatherm mi | Dec. 31, 2021 USD ($)
Rates and Other Regulatory Activities [Line Items] |  |
COVID-19 Regulatory Asset | $ 2,000 | $ 2,300
Florida Public Utilities Company [Member] |  |
Rates and Other Regulatory Activities [Line Items] |  |
COVID-19 Settlement Amount | 2,100 |
Delaware natural gas division [Member] |  |
Rates and Other Regulatory Activities [Line Items] |  |
Regulatory Liabilities | 12,551 | 12,591
Maryland Division [Member] |  |
Rates and Other Regulatory Activities [Line Items] |  |
Regulatory Liabilities | 3,806 | 3,840
Sandpiper [Member] |  |
Rates and Other Regulatory Activities [Line Items] |  |
Regulatory Liabilities | 3,641 | 3,656
Central Florida Gas Division [Member] |  |
Rates and Other Regulatory Activities [Line Items] |  |
Regulatory Liabilities | 7,986 | 8,032
Florida Public Utilities Company [Member] |  |
Rates and Other Regulatory Activities [Line Items] |  |
Regulatory Liabilities | 19,086 | 19,189
Fort Meade and Indiantown Divisions [Member] |  |
Rates and Other Regulatory Activities [Line Items] |  |
Regulatory Liabilities | 268 | 271
FPU electric division [Member] |  |
Rates and Other Regulatory Activities [Line Items] |  |
Regulatory Liabilities | 5,176 | 5,237
Eastern Shore Gas Company [Member] |  |
Rates and Other Regulatory Activities [Line Items] |  |
Regulatory Liabilities | 34,190 | 34,190
Elkton Gas [Member] |  |
Rates and Other Regulatory Activities [Line Items] |  |
Regulatory Liabilities | $ 1,091 | $ 1,091
Beachside Expansion | Peninsula Pipeline Company [Member] |  |
Rates and Other Regulatory Activities [Line Items] |  |
Number of Mainline Pipeline Miles | mi | 11.3 |
Additional Firm Natural Gas Transportation Deliverability | Dekatherm | 10,176 |
Winter Haven Expansion | Peninsula Pipeline Company [Member] |  |
Rates and Other Regulatory Activities [Line Items] |  |
Additional Firm Natural Gas Transportation Deliverability | Dekatherm | 6,800 |

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- Definition Additional Firm Natural Gas Transportation Deliverability + References No definition available. + Details
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- Definition COVID-19 Regulatory Asset + References No definition available. + Details
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- Definition COVID-19 Settlement Amount + References No definition available. + Details
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- Definition Rates and Other Regulatory Activities [Line Items] + References No definition available. + Details
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- Definition The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 405 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394 + Details
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