Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2015

Supplemental Retirement Plan

Benefit plans

Schedule of components of net periodic benefit cost

	Three Months Ended March 31,
	2015		2014
	(Dollars in thousands)
Components of net periodic benefit cost:
Service cost	$	216	$	179
Interest cost		221		228
Amortization of net actuarial loss		96		35
Net periodic benefit cost	$	533	$	442

Split-Dollar Life Insurance Benefit Plan

Benefit plans

Schedule of change in projected benefit obligation

	March 31, 2015		December 31, 2014
	(Dollars in thousands)
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$	4,641	$	4,353
Interest cost		42		196
Amortization of net actuarial loss		—		92
Projected benefit obligation at end of period	$	4,683	$	4,641

	March 31, 2015		December 31, 2014
	(Dollars in thousands)
Net actuarial loss	$	591	$	540
Prior transition obligation		1,485		1,507
Accumulated other comprehensive loss	$	2,076	$	2,047

	For the Three Months Ended March 31,
	2015			2014
	(Dollars in thousands)
Amortization of prior transition obligation	$	(12	)	$	(26	)
Interest cost		50			49
Net periodic benefit cost	$	38		$	23