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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Net unrealized loss, tax benefit (expense) | $ 0 |  |
Net unrealized loss, tax benefit (expense) |  | $ (78) | $ 24
Reclassification of net realized loss, tax benefit | 375 |  |
Reclassification of net realized loss, tax benefit |  | 473 | 1,294
Pension and other postretirement benefits activity, tax benefit (expense) | 3,452 | (1,585) | 693
ARIZONA PUBLIC SERVICE COMPANY |  |  |
Net unrealized loss, tax benefit (expense) | 0 |  |
Net unrealized loss, tax benefit (expense) |  | (78) | 24
Reclassification of net realized loss, tax benefit | 375 |  |
Reclassification of net realized loss, tax benefit |  | 473 | 1,294
Pension and other postretirement benefits activity, tax benefit (expense) | $ 3,136 | $ (1,159) | $ 977

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- Definition Amount, before reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e640-108580 + Details
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- Definition Amount of tax expense (benefit) for reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e640-108580 + Details
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