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TAX EFFECT ALLOCATED TO EACH COMPONENT OF OTHER COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Statement of Income and Comprehensive Income |  |
Amortization of net losses of pension and postretirement benefit plans | $ (2,011) | $ (2,203)
Unrealized holding gains on debt securities arising during the period | (65,341) | (8,460)
Unrealized net losses on cash flow hedges | 1,113 | 245
Reclassification adjustment for net losses included in net income | (486) | (386)
Income tax expenses | $ (66,725) | $ (10,804)

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- Definition Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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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