Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2022

Equity [Abstract]

Schedule of AOCI

The following table summarizes the changes within each classification of AOCI, net of tax:

(dollars in thousands)	Unrealized Gains and Losses on Available- for-Sale Debt Securities		Unrealized Gains and Losses on Held-to- Maturity Securities		Gains and Losses on Cash Flow Hedges		Defined Benefit Pension Plans		Total
Three Months Ended March 31, 2022
Balance at beginning of period	$	(2,950)	$	—	$	543	$	32	$	(2,375)
Other comprehensive income (loss) before    reclassifications	(311,153)		(16,963)		(7,170)		—		(335,286)
Amounts reclassified from AOCI to income (1)	(261)		236		(505)		(8)		(538)
Balance at end of period	$	(314,364)	$	(16,727)	$	(7,132)	$	24	$	(338,199)
Three Months Ended March 31, 2021
Balance at beginning of period	$	145,335	$	—	$	2,584	$	(148)	$	147,771
Other comprehensive income (loss) before    reclassifications	(57,287)		—		3,053		—		(54,234)
Amounts reclassified from AOCI to income (1)	(1,553)		—		(112)		37		(1,628)
Balance at end of period	$	86,495	$	—	$	5,525	$	(111)	$	91,909

(1)See tables below for details about reclassifications to income.

Reclassifications out of AOCI

The following table summarizes the significant amounts reclassified out of each component of AOCI for the three months ended March 31, 2022 and 2021:

	Three Months Ended March 31,
(dollars in thousands)	2022		2021
Details about AOCI Components	Amount Reclassified from AOCI				Affected Line Item in the Statement of Income
Unrealized gains and losses on    available-for-sale securities	$	342	$	1,993	Debt securities gains (losses), net
	(81)		(440)		Income tax (expense) benefit
	$	261	$	1,553	Net income (loss)
Unrealized gains and losses on    held-to-maturity securities	$	(310)	$	—	Interest income (expense)
	74		—		Income tax (expense) benefit
	$	(236)	$	—	Net income (loss)
Gains and losses on cash flow hedges    Interest rate contracts	$	669	$	149	Interest income (expense)
	(164)		(37)		Income tax (expense) benefit
	$	505	$	112	Net income (loss)
Amortization of defined benefit    pension items
Actuarial gains (losses)	$	11	$	(49)	Salaries and employee benefits
	(3)		12		Income tax (expense) benefit
	$	8	$	(37)	Net income (loss)
Total reclassifications for the period	$	538	$	1,628	Net income (loss)