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Regulatory Matters - Schedule of Regulatory Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Detail of regulatory assets |  |
Regulatory assets, current | $ 518,524 | $ 291,713
Regulatory assets, non-current | 1,192,987 | 1,133,987
Pension |  |
Detail of regulatory assets |  |
Regulatory assets, current | 0 | 0
Regulatory assets, non-current | 509,751 | 469,953
Deferred fuel and purchased power |  |
Detail of regulatory assets |  |
Regulatory assets, current | 388,148 | 175,835
Regulatory assets, non-current | 0 | 0
Income taxes — AFUDC equity |  |
Detail of regulatory assets |  |
Regulatory assets, current | 7,625 | 7,169
Regulatory assets, non-current | 164,768 | 158,776
Ocotillo deferral |  |
Detail of regulatory assets |  |
Regulatory assets, current | 9,507 | 0
Regulatory assets, non-current | 138,143 | 95,723
Retired power plant costs |  |
Detail of regulatory assets |  |
Regulatory assets, current | 15,160 | 28,181
Regulatory assets, non-current | 99,681 | 114,214
SCR deferral |  |
Detail of regulatory assets |  |
Regulatory assets, current | 8,147 | 0
Regulatory assets, non-current | 97,624 | 81,307
Lost fixed cost recovery |  |
Detail of regulatory assets |  |
Regulatory assets, current | 63,889 | 41,807
Regulatory assets, non-current | 0 | 0
Deferred property taxes |  |
Detail of regulatory assets |  |
Regulatory assets, current | 8,569 | 8,569
Regulatory assets, non-current | 41,057 | 49,626
Deferred compensation |  |
Detail of regulatory assets |  |
Regulatory assets, current | 0 | 0
Regulatory assets, non-current | 33,997 | 36,195
Income taxes — investment tax credit basis adjustment |  |
Detail of regulatory assets |  |
Regulatory assets, current | 1,129 | 1,113
Regulatory assets, non-current | 23,639 | 24,291
Four Corners cost deferral |  |
Detail of regulatory assets |  |
Regulatory assets, current | 8,077 | 8,077
Regulatory assets, non-current | 15,998 | 24,075
Palo Verde VIE |  |
Detail of regulatory assets |  |
Regulatory assets, current | 0 | 0
Regulatory assets, non-current | 21,094 | 21,255
Coal reclamation |  |
Detail of regulatory assets |  |
Regulatory assets, current | 2,978 | 1,068
Regulatory assets, non-current | 13,862 | 16,999
Loss on reacquired debt |  |
Detail of regulatory assets |  |
Regulatory assets, current | 1,648 | 1,689
Regulatory assets, non-current | 9,372 | 10,877
Mead-Phoenix transmission line — contributions in aid of construction |  |
Detail of regulatory assets |  |
Regulatory assets, current | 332 | 332
Regulatory assets, non-current | 9,048 | 9,380
Tax expense adjustor mechanism |  |
Detail of regulatory assets |  |
Regulatory assets, current | 656 | 6,226
Regulatory assets, non-current | 5,845 | 0
TCA balancing account |  |
Detail of regulatory assets |  |
Regulatory assets, current | 170 | 0
Regulatory assets, non-current | 3,663 | 0
Tax expense of Medicare subsidy |  |
Detail of regulatory assets |  |
Regulatory assets, current | 1,235 | 1,235
Regulatory assets, non-current | 2,469 | 3,704
Demand side management |  |
Detail of regulatory assets |  |
Regulatory assets, current | 919 | 0
Regulatory assets, non-current | 0 | 7,268
PSA interest |  |
Detail of regulatory assets |  |
Regulatory assets, current | 335 | 4,355
Regulatory assets, non-current | 0 | 0
Deferred fuel and purchased power - mark-to-market |  |
Detail of regulatory assets |  |
Regulatory assets, current | 0 | 3,341
Regulatory assets, non-current | 0 | 9,244
Other |  |
Detail of regulatory assets |  |
Regulatory assets, current | 0 | 2,716
Regulatory assets, non-current | $ 2,976 | $ 1,100

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- Definition The amount for the individual regulatory current asset including deferred fuel and purchased power as itemized in a table of regulatory current assets as of the end of the period. + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer. + 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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