Retirement Plans and Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2014

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Cost (Income)

Components of net periodic benefit cost (income) were as follows:

	Three Months Ended June 30,
	2014			2013			2014		2013
(Dollars in thousands)	Retirement Plans						Other Post Retirement Benefits
Service cost	$	137		$	155		$	18	$	25
Interest cost		475			426			31		27
Expected return on plan assets		(745	)		(709	)		—		—
Amortization of net actuarial loss		165			343			2		6
Accretion of prior service cost		(71	)		(59	)		2		(4	)
Net periodic benefit (income) cost	$	(39	)	$	156		$	53	$	54

	Six Months Ended June 30,
	2014			2013			2014			2013
(Dollars in thousands)	Retirement Plans						Other Post Retirement Benefits
Service cost	$	273		$	311		$	37		$	46
Interest cost		950			857			67			56
Expected return on plan assets		(1,490	)		(1,264	)		—			—
Amortization of net actuarial loss		326			629			5			12
Accretion of prior service cost		(141	)		(118	)		(3	)		(9	)
Net periodic benefit (income) cost	$	(82	)	$	415		$	106		$	105