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Regulatory Assets, Net (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Regulatory Assets [Line Items] |  |
Regulatory assets | $ 182,110 | $ 158,230
Less: current regulatory assets, net | 3,249 | 1,748
Total regulatory assets, net, less current portion | 178,861 | 156,482
Regulatory assets, net not earning a return | 121,090 | 119,236
Income tax temporary differences |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 15,772 | 6,230
Postretirement pensions and other medical benefits |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 99,213 | 95,559
Business combinations debt premium, net |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 20,573 | 22,479
Balancing and memorandum accounts, net |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 33,277 | 25,463
Water Rate Adjustment |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 5,489 | 323
Other, net |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | $ 7,786 | $ 8,176

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- Definition The amount for the individual regulatory asset as itemized in a table of regulatory assets 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 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
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- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
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- Definition Remaining balance of regulatory assets for which no return on investment during recovery is provided. In some cases, a regulator may permit an enterprise to include a cost that would be charged to expense by an unregulated enterprise as an allowable cost over a period of time by amortizing that cost for rate-making purposes, but the regulator does not include the unrecovered amount in the rate base. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 55 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123406419&loc=d3e44360-110383 + Details
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