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Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Statement of Comprehensive Income [Abstract] |  |
Amortization of actuarial losses, net of taxes | $ 36 | $ 30
Amortization of prior service credits, net of taxes | 6 | 6
Net unrealized losses on securities, net of taxes | (986) | 4,642
Reclassification adjustment for net losses included in net income, net of taxes |  | (12)
Net unrealized gains (losses) on cash flow hedges, net of taxes | (3,461) | 6,190
Change in fair value of liabilities related to instrument-specific credit risk, net of taxes | $ (36) | $ (489)

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- Definition Amount of tax (expense) benefit of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan. + 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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- 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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