ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)

3 Months Ended

Mar. 31, 2021

Equity [Abstract]

Related Tax Effects Allocated to Other Comprehensive Income and Accumulated Other Comprehensive Income (Loss)

The related tax effects allocated to other comprehensive income and reclassifications out of accumulated other comprehensive income (loss) are as follows:

	Three months ended March 31, 2021
	Total other comprehensive income (loss)										Total accumulated other comprehensive income (loss)
(Dollars in thousands)	Prior to reclass		Reclass from		Pre-tax		Tax effect		Net of tax		Beginning balance		Net activity		Ending balance
Unrealized gain (loss) on debt securities	$	(39,658)	$	(166)	$	(39,492)	$	8,524	$	(30,968)	$	73,576	$	(30,968)	$	42,608
Retirement obligation	0		(525)		525		(120)		405		(24,912)		405		(24,507)
Total	$	(39,658)	$	(691)	$	(38,967)	$	8,404	$	(30,563)	$	48,664	$	(30,563)	$	18,101

	Three months ended March 31, 2020
	Total other comprehensive income (loss)										Total accumulated other comprehensive income (loss)
(Dollars in thousands)	Prior to reclass		Reclass from		Pre-tax		Tax effect		Net of tax		Beginning balance		Net activity		Ending balance
Unrealized gain (loss) on debt securities	$	(2,434)	$	(59)	$	(2,375)	$	512	$	(1,863)	$	41,264	$	(1,863)	$	39,401
Retirement obligation	0		(425)		425		(97)		328		(27,941)		328		(27,613)
Total	$	(2,434)	$	(484)	$	(1,950)	$	415	$	(1,535)	$	13,323	$	(1,535)	$	11,788

Other Accumulated Comprehensive income reclassified from AOCI

The following table presents the activity reclassified from accumulated other comprehensive income into income during the three month periods ended March 31, 2021 and 2020, respectively:

	Amount reclassified from accumulated other comprehensive income (loss)
	Three months ended
	March 31,
(Dollars in thousands)	2021		2020		Affected Line Item in the Consolidated Statements of Income
Realized gain (loss) on securities available-for-sale	$	(166)	$	(59)	Net gain (loss) on sales of investments securities
Defined benefit pension plan
Amortization of prior service cost (1)	100		100		Other noninterest expense
Recognized net actuarial loss (1)	(625)		(525)		Other noninterest expense
Defined benefit pension plan total	(525)		(425)
Total reclassifications for the period, before tax	$	(691)	$	(484)

(1) Included in the computation of net periodic pension cost (see Note 13 - Employee Benefit Plans for additional details).