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Regulatory Matters - Schedule of Regulatory Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Detail of regulatory assets |  |
Current | $ 184,459 | $ 166,902
Non-Current | 1,321,431 | 1,342,941
Pension |  |
Detail of regulatory assets |  |
Current | 0 | 0
Non-Current | 712,907 | 733,351
Retired power plant costs |  |
Detail of regulatory assets |  |
Current | 28,182 | 28,182
Non-Current | 153,122 | 167,164
Income taxes — allowance for funds used during construction (AFUDC) equity |  |
Detail of regulatory assets |  |
Current | 6,457 | 6,457
Non-Current | 152,388 | 151,467
Deferred fuel and purchased power — mark-to-market (Note 7) |  |
Detail of regulatory assets |  |
Current | 55,729 | 31,728
Non-Current | 21,516 | 23,768
Deferred fuel and purchased power |  |
Detail of regulatory assets |  |
Current | 30,559 | 37,164
Non-Current | 0 | 0
Four Corners cost deferral |  |
Detail of regulatory assets |  |
Current | 8,077 | 8,077
Non-Current | 36,190 | 40,228
Income taxes — investment tax credit basis adjustment |  |
Detail of regulatory assets |  |
Current | 1,079 | 1,079
Non-Current | 25,170 | 25,522
Lost fixed cost recovery |  |
Detail of regulatory assets |  |
Current | 25,746 | 32,435
Non-Current | 0 | 0
Palo Verde VIEs (Note 6) |  |
Detail of regulatory assets |  |
Current | 0 | 0
Non-Current | 20,325 | 20,015
Deferred compensation |  |
Detail of regulatory assets |  |
Current | 0 | 0
Non-Current | 37,572 | 36,523
Deferred property taxes |  |
Detail of regulatory assets |  |
Current | 8,569 | 8,569
Non-Current | 62,072 | 66,356
Loss on reacquired debt |  |
Detail of regulatory assets |  |
Current | 1,637 | 1,637
Non-Current | 12,850 | 13,668
Tax expense of Medicare subsidy |  |
Detail of regulatory assets |  |
Current | 1,235 | 1,235
Non-Current | 5,772 | 6,176
TCA balancing account |  |
Detail of regulatory assets |  |
Current | 5,381 | 3,860
Non-Current | 3,895 | 772
AG-1 deferral |  |
Detail of regulatory assets |  |
Current | 2,787 | 2,654
Non-Current | 4,110 | 5,819
Mead-Phoenix transmission line CIAC |  |
Detail of regulatory assets |  |
Current | 332 | 332
Non-Current | 9,878 | 10,044
Coal reclamation |  |
Detail of regulatory assets |  |
Current | 1,546 | 1,546
Non-Current | 16,250 | 15,607
SCR deferral |  |
Detail of regulatory assets |  |
Current | 0 | 0
Non-Current | 37,919 | 23,276
Tax expense adjustor mechanism |  |
Detail of regulatory assets |  |
Current | 3,149 | 0
Non-Current | 0 | 0
Ocotillo deferral |  |
Detail of regulatory assets |  |
Current | 0 | 0
Non-Current | 9,495 | 0
Other |  |
Detail of regulatory assets |  |
Current | 3,994 | 1,947
Non-Current | $ 0 | $ 3,185

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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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