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Note Receivable and Customers' Advances for Construction (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 USD ($) Municipality | Dec. 31, 2019 USD ($)
Note Receivable and Customers' Advances for Construction [Abstract] |  |
Number of municipalities with agreements to extend water service | Municipality | 1 |
Interest income on note receivable | $ 139 | $ 121
Interest rate on note outstanding | 7.50% |
Amounts Related to Water District Projects Included in Balance Sheet [Abstract] |  |
Note receivable, including interest | $ 255 | 255
Customers' advances for construction | 302 | 303
Other customers' advances for construction | $ 10,024 | $ 7,541

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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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Balance Type: | debit
Period Type: | instant

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- Definition Stated interest rate of notes receivable from time-sharing transactions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 978 -SubTopic 310 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68077313&loc=d3e27327-108691 + Details
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- References No definition available. + Details
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- Definition For utilities only, represents the carrying amount of the liability related to water district projects as of the balance sheet date for payments received by a utility from its customers in advance of performing its obligations under terms of its construction agreements. + References No definition available. + Details
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- Definition The amount of interest income on notes receivable. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Number of municipalities the Company has agreement with to extend water service into previously formed water districts. + References No definition available. + Details
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- Definition For utilities only, represents the carrying amount of the liability related to other projects as of the balance sheet date for payments received by a utility from its customers in advance of performing its obligations under terms of its construction agreements. + References No definition available. + Details
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Balance Type: | credit
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