13. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The following tables present the components of other comprehensive income for the three months ended March 31, 2019 and 2018, by component:



(dollars in thousands)	Before Tax		Tax Effect		Net of Tax
Three Months Ended March 31, 2019
Net unrealized gains on investment securities:
Net unrealized gains arising during the period	$	15,024	$	4,028	$	10,996
Less: Reclassification adjustments from AOCI realized in net income	—		—		—
Net unrealized gains on investment securities	15,024		4,028		10,996

Defined benefit plans:
Amortization of net actuarial loss	263		29		234
Amortization of net transition obligation	5		1		4
Amortization of prior service cost	5		1		4
Defined benefit plans, net	273		31		242

Other comprehensive income	$	15,297	$	4,059	$	11,238



(dollars in thousands)	Before Tax			Tax Effect			Net of Tax
Three Months Ended March 31, 2018
Net unrealized losses on investment securities:
Net unrealized losses arising during the period	$	(20,455	)	$	(5,484	)	$	(14,971	)
Less: Reclassification adjustments from AOCI realized in net income	—			—			—
Net unrealized losses on investment securities	(20,455		)	(5,484		)	(14,971		)

Defined benefit plans:
Amortization of net actuarial loss	341			93			248
Amortization of net transition obligation	5			1			4
Amortization of prior service cost	5			1			4
Defined benefit plans, net	351			95			256

Other comprehensive loss	$	(20,104	)	$	(5,389	)	$	(14,715	)

The following tables present the changes in each component of AOCI, net of tax, for the three months ended March 31, 2019 and 2018:



(dollars in thousands)	Investment Securities			Defined Benefit Plans			AOCI
Three Months Ended March 31, 2019
Balance at beginning of period	$	(9,643	)	$	(6,450	)	$	(16,093	)
Impact of the adoption of new accounting standards	(3,100		)	—			(3,100		)
Adjusted balance at beginning of period	(12,743		)	(6,450		)	(19,193		)

Other comprehensive income before reclassifications	10,996			—			10,996
Reclassification adjustments from AOCI	—			242			242
Total other comprehensive income	10,996			242			11,238

Balance at end of period	$	(1,747	)	$	(6,208	)	$	(7,955	)



(dollars in thousands)	Investment Securities			Defined Benefit Plans			AOCI
Three Months Ended March 31, 2018
Balance at beginning of period	$	5,073		$	(6,112	)	$	(1,039	)
Impact of the adoption of new accounting standards	(139		)	—			(139		)
Adjusted balance at beginning of period	4,934			(6,112		)	(1,178		)

Impact of the adoption of new accounting standards	(455		)	(1,381		)	(1,836		)

Other comprehensive income before reclassifications	(14,971		)	—			(14,971		)
Reclassification adjustments from AOCI	—			256			256
Total other comprehensive income (loss)	(14,971		)	256			(14,715		)

Balance at end of period	$	(10,492	)	$	(7,237	)	$	(17,729	)

The following table presents the amounts reclassified out of each component of AOCI for the three months ended March 31, 2019 and 2018:



	Amount Reclassified from AOCI						Affected Line Item in the Statement Where Net Income is Presented
Details about AOCI Components	Three months ended March 31,
(dollars in thousands)	2019			2018
Sale of investment securities available-for-sale:
Realized losses on securities available-for-sale	$	—		$	—		Investment securities gains (losses)
Tax effect	—			—			Income tax benefit (expense)
Net of tax	$	—		$	—

Defined benefit retirement and supplemental executive retirement plan items:
Amortization of net actuarial loss	$	(263	)	$	(341	)	Salaries and employee benefits
Amortization of net transition obligation	(5		)	(5		)	Salaries and employee benefits
Amortization of prior service cost	(5		)	(5		)	Salaries and employee benefits
Total before tax	(273		)	(351		)
Tax effect	31			95			Income tax benefit (expense)
Net of tax	$	(242	)	$	(256	)

Total reclassification adjustments from AOCI for the period, net of tax	$	(242	)	$	(256	)