Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2021

Equity [Abstract]

Schedule of Changes in Accumulated Other Comprehensive Income (Loss)

The tables below summarize the changes in accumulated other comprehensive income (loss) by component for the three months ended March 31, 2021 and 2020, net of tax:

March 31, 2021	Unrealized Gains and Losses on Available-for-Sale Securities		Postretirement Benefit Items		Total
Beginning Balance at January 1, 2021	$	35,943	$	(568)	$	35,375
Other Comprehensive Income (Loss) Before Reclassification	(21,058)		—		(21,058)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	(770)		—		(770)
Net Current Period Other Comprehensive Income (Loss)	(21,828)		—		(21,828)
Ending Balance at March 31, 2021	$	14,115	$	(568)	$	13,547

March 31, 2020	Unrealized Gains and Losses on Available-for-Sale Securities		Postretirement Benefit Items		Total
Beginning Balance at January 1, 2020	$	15,673	$	(568)	$	15,105
Other Comprehensive Income (Loss) Before Reclassification	13,718		—		13,718
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	(463)		—		(463)
Net Current Period Other Comprehensive Income (Loss)	13,255		—		13,255
Ending Balance at March 31, 2020	$	28,928	$	(568)	$	28,360

Schedule of Classifications Out of Accumulated Other Comprehensive Income (Loss)

The tables below summarize the classifications out of accumulated other comprehensive income (loss) by component for the three months ended March 31, 2021 and 2020:

Details about Accumulated Other Comprehensive Income (Loss) Components	Amount Reclassified From Accumulated Other Comprehensive Income (Loss)		Affected Line Item in the Statement Where Net Income is Presented
Unrealized Gains and Losses on     Available-for-Sale Securities	$	975	Net Gains on Securities
	(205)		Income Tax Expense
	770		Net of Tax
Total Reclassifications for the Three     Months Ended March 31, 2021	$	770

Details about Accumulated Other Comprehensive Income (Loss) Components	Amount Reclassified From Accumulated Other Comprehensive Income (Loss)		Affected Line Item in the Statement Where Net Income is Presented
Unrealized Gains and Losses on     Available-for-Sale Securities	$	590	Net Gains on Securities
	(127)		Income Tax Expense
	463		Net of Tax
Total Reclassifications for the Three     Months Ended March 31, 2020	$	463