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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Statement of Comprehensive Income [Abstract] |  |  |  |
Net change in unrealized gains (losses) on available-for-sale securities, net of tax of ($978), $1,084, ($6,938) and $3,958, respectively | $ (978) | $ 1,084 | $ (6,938) | $ 3,958
Net reclassification adjustment for net (gains) losses included in net income, net of tax of $0, ($59), $6 and ($66), respectively(1) | 0 | (59) | 6 | (66)
Net change in unrealized losses on cash flow hedging derivatives, net of tax of $84, ($127), $667 and ($556), respectively | 84 | (127) | 667 | (556)
Net reclassification adjustment for effective portion of cash flow hedges, net of tax of ($73), ($68), ($142) and ($143), respectively(2) | (73) | (68) | (142) | (143)
Reclassification of amortization of net unrecognized actuarial loss and prior service cost, net of tax of ($13), ($31), ($39) and ($94), respectively(3) | $ (13) | $ (31) | $ (39) | $ (94)

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- Definition Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities. + 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=114867106&loc=d3e640-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 + Details
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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=114867106&loc=d3e640-108580 + Details
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