Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2016

Supplemental Retirement Plan

Benefit plans

Schedule of components of net periodic benefit cost

	Three Months Ended March 31,
	2016		2015
	(Dollars in thousands)
Components of net periodic benefit cost:
Service cost	$	133	$	216
Interest cost		259		221
Amortization of net actuarial loss		60		96
Net periodic benefit cost	$	452	$	533

Split-Dollar Life Insurance Benefit Plan

Benefit plans

Schedule of components of net periodic benefit cost

	For the Three Months Ended March 31,
	2016			2015
	(Dollars in thousands)
Amortization of prior transition obligation	$	(13	)	$	(12	)
Interest cost		62			50
Net periodic benefit cost	$	49		$	38

Schedule of change in projected benefit obligation

	March 31, 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		62		169
Amortization of net actuarial loss		—		1,405
Projected benefit obligation at end of period	$	6,277	$	6,215

Schedule of amounts recognized in accumulated other comprehensive loss

	March 31, 2016		December 31, 2015
	(Dollars in thousands)
Net actuarial loss	$	2,183	$	2,147
Prior transition obligation		1,395		1,418
Accumulated other comprehensive loss	$	3,578	$	3,565