Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2019

Supplemental Retirement Plan

Benefit plans

Schedule of change in projected benefit obligation

	2019		2018
	(Dollars in thousands)
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$	26,781	$	28,510
Projected benefit obligation of SERP agreements acquired from Presidio		2,541		—
Service cost		263		249
Actuarial loss (gain)		4,182		(1,885)
Interest cost		1,059		947
Benefits paid		(1,137)		(1,040)
Projected benefit obligation at end of year	$	33,689	$	26,781
Amounts recognized in accumulated other comprehensive loss:
Net actuarial loss	$	9,670	$	5,672

Schedule of weighted-average assumptions used to determine the benefit obligation

	2019		2018
Discount rate	3.01	%	4.03	%
Rate of compensation increase	N/A		N/A

Schedule of estimated benefit payments over the next ten years, which reflect anticipated future events, service and other assumptions

	Estimated
	Benefit
Year	Payments
	(Dollars in thousands)
2020	$	1,509
2021		1,717
2022		1,863
2023		1,974
2024		2,011
2025 to 2029		11,366
	$	20,440

Schedule of components of net periodic benefit cost

	2019		2018
	(Dollars in thousands)
Components of net periodic benefit cost:
Service cost	$	263	$	249
Interest cost		1,059		947
Amortization of net actuarial loss		184		292
Accelerated benefits for Presidio SERP agreements
due to change in control		1,465		—
Net periodic benefit cost	$	2,971	$	1,488
Amount recognized in other comprehensive income	$	2,847	$	1,577

Schedule of assumption used to determine the net periodic benefit cost

	2019		2018
Discount rate	4.03	%	3.38	%
Rate of compensation increase	N/A		N/A

Split-Dollar Life Insurance Benefit Plan

Benefit plans

Schedule of change in projected benefit obligation

	December 31,		December 31,
	2019		2018
	(Dollars in thousands)
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$	6,903	$	6,711
Interest cost		278		227
Actuarial loss (gain)		1,017		(35)
Projected benefit obligation at end of period	$	8,198	$	6,903

Schedule of amounts recognized in accumulated other comprehensive loss

	December 31,		December 31,
	2019		2018
	(Dollars in thousands)
Net actuarial loss	$	3,776	$	2,573
Prior transition obligation		1,059		1,149
Accumulated other comprehensive loss	$	4,835	$	3,722

Schedule of weighted-average assumptions used to determine the benefit obligation

	2019		2018
Discount rate	3.01	%	4.03	%

Schedule of components of net periodic benefit cost

	2019		2018
	(Dollars in thousands)
Amortization of prior transition obligation	$	(96)	$	(65)
Interest cost		278		227
Net periodic benefit cost	$	182	$	162
Amount recognized in other comprehensive income	$	1,113	$	(30)

Schedule of assumption used to determine the net periodic benefit cost

	2019		2018
Discount rate	4.03	%	3.38	%