Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2020

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, 2020
Balance at beginning of period	$	56,131	$	—	$	240	$	(164)	$	56,207
Other comprehensive income (loss) before    reclassifications	80,369		—		5,886		—		86,255
Amounts reclassified from AOCI to income (1)	(4,000)		—		(325)		20		(4,305)
Balance at end of period	$	132,500	$	—	$	5,801	$	(144)	$	138,157
Three Months Ended March 31, 2019
Balance at beginning of period	$	(37,348)	$	(8,515)	$	1,099	$	(186)	$	(44,950)
Other comprehensive income (loss) before    reclassifications	47,711		—		(296)		—		47,415
Amounts reclassified from AOCI to income (1)	79		351		(290)		15		155
Balance at end of period	$	10,442	$	(8,164)	$	513	$	(171)	$	2,620

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

Reclassifications out of Accumulated Other Comprehensive Income (Loss)

The following table summarizes the significant amounts reclassified out of each component of AOCI:

Details about AOCI Components	Amount Reclassified from AOCI				Affected Line Item in the Statement of Income
	Three Months Ended March 31,
(dollars in thousands)	2020		2019
Unrealized gains and losses on    available-for-sale debt securities	$	5,174	$	(103)	Debt securities gains (losses), net
	(1,174)		24		Income tax (expense) benefit
	$	4,000	$	(79)	Net income
Unrealized gains and losses on    held-to-maturity securities	$	—	$	(457)	Interest income (expense)
	—		106		Income tax (expense) benefit
	$	—	$	(351)	Net income
Gains and losses on cash flow hedges    Interest rate contracts	$	431	$	385	Interest income (expense)
	(106)		(95)		Income tax (expense) benefit
	$	325	$	290	Net income
Amortization of defined benefit    pension items
Actuarial gains (losses)	$	(27)	$	(20)	Salaries and employee benefits
	7		5		Income tax (expense) benefit
	$	(20)	$	(15)	Net income
Total reclassifications for the period	$	4,305	$	(155)	Net income