Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2013

Benefit plans

Schedule of components of net periodic benefit cost

	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
	(Dollars in thousands)
Components of net periodic benefit cost:
Service cost	$	302	$	294	$	606	$	588
Interest cost		196		193		392		386
Amortization of prior service cost		—		7		—		14
Amortization of net actuarial loss		75		63		146		126
Net periodic benefit cost	$	573	$	557	$	1,144	$	1,114

Schedule of funded status of split-dollar life insurance benefits

	June 30, 2013		December 31, 2012
	(Dollars in thousands)
Change in projected benefit obligation
Projected benefit obligation at beginning of year	$	4,717	$	4,525
Interest cost		89		185
Actuarial gain		2		7
Projected benefit obligation at end of period	$	4,808	$	4,717