Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2016

Supplemental Retirement Plan

Benefit plans

Schedule of components of net periodic benefit cost

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(Dollars in thousands)
Components of net periodic benefit cost:
Service cost	$	133	$	216	$	266	$	432
Interest cost		259		221		518		442
Amortization of net actuarial loss		60		96		120		192
Net periodic benefit cost	$	452	$	533	$	904	$	1,066

Split-Dollar Life Insurance Benefit Plan

Benefit plans

Schedule of components of net periodic benefit cost

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
	(Dollars in thousands)
Amortization of prior transition obligation	$	(13	)	$	(44	)	$	(26	)	$	(56	)
Interest cost		62			34			124			84
Net periodic benefit cost	$	49		$	(10	)	$	98		$	28

Schedule of change in projected benefit obligation

	June 30, 2016		December 31, 2015
	(Dollars in thousands)
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$	6,215	$	4,641
Interest cost		124		169
Amortization of net actuarial loss		—		1,405
Projected benefit obligation at end of period	$	6,339	$	6,215

Schedule of amounts recognized in accumulated other comprehensive loss

	June 30, 2016		December 31, 2015
	(Dollars in thousands)
Net actuarial loss	$	2,218	$	2,147
Prior transition obligation		1,373		1,418
Accumulated other comprehensive loss	$	3,591	$	3,565