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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
Statement of Comprehensive Income [Abstract]
Changes in benefit obligations and plan assets for defined benefit and postretirement benefit plans, deferred income taxes	$ 0	$ 0	$ (1)
Unrealized gain (loss) on available for sale securities, deferred income taxes	$ 807	$ (495)	$ 147

X

- Definition

Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan.

+ References

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-Publisher FASB
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-Topic 220
-SubTopic 10
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- Definition

Amount of tax expense (benefit) before reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities.

+ References

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-Publisher FASB
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