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Note 4 - Comprehensive Income (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Comprehensive Income (Loss) [Table Text Block]

		Before-Tax				Income Tax				Net-of-Tax
		Amount				Effect				Amount
Three Months Ended March 31, 2020
Other comprehensive income from available-for-sale debt securities, Unrealized holding gains on available-for-sale debt securities		$	7,240			$	(1,521	)		$	5,719
Unfunded pension and postretirement obligations:
Changes from plan amendments and actuarial gains and losses			88				(18	)			70
Amortization of prior service cost and net actuarial loss included in net periodic benefit cost			(8	)			2				(6	)
Other comprehensive income on unfunded retirement obligations			80				(16	)			64
Total other comprehensive income		$	7,320			$	(1,537	)		$	5,783

		Before-Tax				Income Tax				Net-of-Tax
		Amount				Effect				Amount
Three Months Ended March 31, 2019
Other comprehensive income from available-for-sale debt securities, Unrealized holding gains on available-for-sale securities		$	4,261			$	(895	)		$	3,366
Unfunded pension and postretirement obligations:
Changes from plan amendments and actuarial gains and losses included in other comprehensive income			214				(45	)			169
Amortization of prior service cost and net actuarial loss included in net periodic benefit cost			(8	)			2				(6	)
Other comprehensive income on unfunded retirement obligations			206				(43	)			163
Total other comprehensive income		$	4,467			$	(938	)		$	3,529

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

		Unrealized								Accumulated
		Gains				Unfunded				Other
		(Losses)				Retirement				Comprehensive
		on Securities				Obligations				Income (Loss)
Three Months Ended March 31, 2020
Balance, beginning of period		$	3,511			$	180			$	3,691
Other comprehensive income during three months ended March 31, 2020			5,719				64				5,783
Balance, end of period		$	9,230			$	244			$	9,474
Three Months Ended March 31, 2019
Balance, beginning of period		$	(4,307	)		$	137			$	(4,170	)
Other comprehensive income during three months ended March 31, 2019			3,366				163				3,529
Balance, end of period		$	(941	)		$	300			$	(641	)

Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]

		Reclassified from
		Accumulated Other
Details about Accumulated Other		Comprehensive			Affected Line Item in the Consolidated
Comprehensive Income Components		Income			Statements of Income
Amortization of defined benefit pension and postretirement items:
Prior service cost			(8	)	Other noninterest expense
			2		Income tax provision
Total reclassifications for the period		$	(6	)

		Reclassified from
		Accumulated Other
Details about Accumulated Other		Comprehensive			Affected Line Item in the Consolidated
Comprehensive Income (Loss) Components		Income (Loss)			Statements of Income
Amortization of defined benefit pension and postretirement items:
Prior service cost			(8	)	Other noninterest expense
			2		Income tax provision
Total reclassifications for the period		$	(6	)

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e526-108580

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