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Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Interest Rate Swap [Abstract] |  |
Term of debt on utilities rated A- used to discount prospective cash flows | 30 years |
Reduction in the fair value of swap liability | $ 99 |
Fair Value Measurements [Abstract] |  |
Customers' advances for construction | 10,326 | $ 7,844
Note receivable | 255 | 255
Fair Value on a Recurring Basis [Member] |  |
Interest Rate Swap [Abstract] |  |
Interest rate swap | 2,731 | 2,248
Fair Value on a Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Interest Rate Swap [Abstract] |  |
Interest rate swap | 2,731 | 2,248
Carrying Amount [Member] |  |
Fair Value, Financial Liabilities [Abstract] |  |
Total long-term debt | 126,570 | 104,042
Estimated Fair Value [Member] |  |
Fair Value, Financial Liabilities [Abstract] |  |
Total long-term debt | $ 151,000 | $ 115,000

X
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130532-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045 + Details
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- Definition Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities. + References No definition available. + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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- Definition Amount, after allowance for credit loss, of financing receivable, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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=120391452&loc=d3e13212-122682 + Details
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- Definition The increase or decrease in the value of an interest rate swap due to a contractual agreement tied to the company's credit rating. + References No definition available. + Details
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- Definition Term of debt on utilities rated A- used in discounting prospective cash flows anticipated to be made under the swap agreement reflecting a representation of the yield to maturity. + References No definition available. + Details
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