Pension and Non-pension Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2016

Defined Benefit Pension Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

The components of our net pension expense, including the SERP, are as follows:

Three months ended March 31,	U.S. Plans						Non-U.S. Plans						Total
(dollars in thousands)	2016			2015			2016			2015			2016			2015
Service cost	$	996		$	1,161		$	317		$	748		$	1,313		$	1,909
Interest cost	3,777			3,709			672			1,103			4,449			4,812
Expected return on plan assets	(5,755		)	(5,662		)	—			(598		)	(5,755		)	(6,260		)
Amortization of unrecognized:
Prior service cost	66			104			(54		)	(64		)	12			40
Actuarial loss	1,120			1,886			202			406			1,322			2,292
Pension expense	$	204		$	1,198		$	1,137		$	1,595		$	1,341		$	2,793

Non-Pension Postretirement Benefit Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

The provision for our non-pension postretirement benefit expense consists of the following:

Three months ended March 31,	U.S. Plans				Non-U.S. Plans					Total
(dollars in thousands)	2016		2015		2016			2015		2016		2015
Service cost	$	199	$	282	$	—		$	—	$	199	$	282
Interest cost	652		660		12			19		664		679
Amortization of unrecognized:
Prior service cost	35		35		—			—		35		35
Actuarial loss / (gain)	20		196		(11		)	—		9		196
Non-pension postretirement benefit expense	$	906	$	1,173	$	1		$	19	$	907	$	1,192