Accumulated Other Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2022

Accumulated Other Comprehensive Income ("AOCI")

Schedule of changes in AOCI by component

	Year Ended December 31, 2022 and 2021
			Unamortized
			Unrealized
	Unrealized		Gain on
	Gains (Losses) on		Available-
	Available-		for-Sale		Defined
	for-Sale		Securities		Benefit
	Securities		Reclassified		Pension
	and I/O		to Held-to-		Plan
	Strips		Maturity		Items(1)		Total
	(Dollars in thousands)
Beginning balance January 1, 2022, net of taxes	$	2,153	$	—	$	(13,149)	$	(10,996)
Other comprehensive (loss) before reclassification,
net of taxes		(13,547)		—		7,395		(6,152)
Amounts reclassified from other comprehensive income,
net of taxes		—		—		292		292
Net current period other comprehensive income (loss),
net of taxes		(13,547)		—		7,687		(5,860)
Ending balance December 31, 2022, net of taxes	$	(11,394)	$	—	$	(5,462)	$	(16,856)
Beginning balance January 1, 2021, net of taxes	$	3,929	$	261	$	(14,907)	$	(10,717)
Other comprehensive (loss) before reclassification,
net of taxes		(1,776)		—		1,308		(468)
Amounts reclassified from other comprehensive income (loss),
net of taxes		—		(261)		450		189
Net current period other comprehensive income (loss),
net of taxes		(1,776)		(261)		1,758		(279)
Ending balance December 31, 2021, net of taxes	$	2,153	$	—	$	(13,149)	$	(10,996)

(1) This AOCI component is included in the computation of net periodic benefit cost (see Note 13—Benefit Plans) and includes split-dollar life insurance benefit plan.

Schedule of reclassifications out of AOCI into net income

	Amounts Reclassified from
	AOCI
	Year Ended
	December 31,						Affected Line Item Where
Details About AOCI Components	2022		2021		2020		Net Income is Presented
	(Dollars in thousands)
Unrealized gains on available-for-sale securities
and I/O strips	$	—	$	—	$	277	Gain on sales of securities
		—		—		(82)	Income tax expense
		—		—		195	Net of tax
Amortization of unrealized gain on securities
available-for-sale that were reclassified to securities
held-to-maturity	$	—	$	371		52	Interest income on taxable securities
		—		(110)		(15)	Income tax expense
		—		261		37	Net of tax
Amortization of defined benefit pension plan items (1)
Prior transition obligation and actuarial losses (2)		41		4		60
Prior service cost and actuarial losses (3)		(455)		(643)		(387)
		(414)		(639)		(327)	Other noninterest expense
		122		189		97	Income tax expense
		(292)		(450)		(230)	Net of tax
Total reclassification from AOCI for the period	$	(292)	$	(189)	$	2

(1) This AOCI component is included in the computation of net periodic benefit cost (see Note 13 — Benefit Plans).

(2)   This is related to the split dollar life insurance benefit plan.

(3)   This is related to the supplemental executive retirement plan.