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The following table presents the changes in each component of accumulated other comprehensive income (loss), net of tax, for the three and nine months ended September 30, 2019 and 2018. (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Note 12. Other Comprehensive Income
AOCI, Debt Securities, Available-for-sale, Adjustment, after Tax	$ 3,842	$ (10,914)	$ (7,044)	$ (3,131)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax, Beginning Balance	75	4,305	2,769	1,381
Accumulated Other Comprehensive Income (Loss), Net of Tax	3,767	6,609	4,275	1,750
Other comprehensive income (loss) before reclassifications	1,174	(3,148)	13,140	(10,206)
OciBeforeReclassificationsNetOfTaxAttributableToParent2	11	(625)	1,664	(3,547)
OCI, before Reclassifications, Net of Tax, Attributable to Parent	1,185	(2,523)	11,476	(6,659)
Reclassification from AOCI Current Period Net of Tax Attributable to Parent	110		1,190	51
Purchased Fixed Annuity for Financing Retirement Benefits [Member] [Default Label]	205	158	1,374	156
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	315	158	2,564	207
Net other comprehensive income during the period	1,064	(3,148)	11,950	(10,257)
Net other comprehensive income (loss) during period	194	(467)	3,038	(3,391)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	870	(2,681)	8,912	(6,866)
Balance at end of period	4,906	(14,062)	4,906	(14,062)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	269	(4,772)	269	(4,772)
Accumulated Other Comprehensive Income (Loss), Net of Tax	4,637	(9,290)	4,637	(9,290)
AOCI, Debt Securities, Available-for-sale, Adjustment, after Tax	(3,842)	10,914	7,044	3,131
Other comprehensive income (loss) before reclassifications	(1,174)	3,148	(13,140)	10,206
OciBeforeReclassificationsNetOfTaxAttributableToParent2	(11)	625	(1,664)	3,547
OCI, before Reclassifications, Net of Tax, Attributable to Parent	(1,185)	2,523	(11,476)	6,659
Reclassification from AOCI Current Period Net of Tax Attributable to Parent	(110)		(1,190)	(51)
Net other comprehensive income during the period	(1,064)	3,148	(11,950)	10,257
Net other comprehensive income (loss) during period	(194)	467	(3,038)	3,391
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(870)	2,681	(8,912)	6,866
Balance at end of period	(4,906)	14,062	(4,906)	14,062
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	75	4,305	(269)	4,772
Accumulated Other Comprehensive Income (Loss), Net of Tax	(4,637)	9,290	(4,637)	9,290
Accumulated Other Comprehensive Income (Loss), Net of Tax	(4,637)	6,609	(4,637)	9,290
Reclassification of the Income Tax Effects of the Tax Cuts and Jobs Act from AOCI				674
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesNetOfTax3
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesNetOfTax1				674
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax, Ending Balance	$ (269)	$ 4,772	$ (269)	$ 4,772

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