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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net unrealized holding gain (loss) from available for sale securities arising during the period, tax	$ (39,489)	$ (20,540)	$ 4,067
Reclassification adjustment of net gain (loss) from sale of available for sale securities included in income, tax	66	496	25
Unrecognized net actuuarial gain (loss) and plan amendments during the period, Tax	659	619	(7)
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost, tax	(96)	(74)	(74)
Net unrealized gain in cash flow hedging instruments arising during the period, Tax	(6,062)	(3,562)	0
Reclassification adjustment for net gain in cash flow hedging instruments included in income, Tax	$ 1,957	$ 138	$ 0

X

- Definition

Amount of tax expense (benefit) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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

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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.

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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.

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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.

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Amount, before adjustment, of tax expense (benefit) for unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes tax expense (benefit) for unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.

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