Pension and Non-pension Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 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 September 30,	U.S. Plans						Non-U.S. Plans						Total
(dollars in thousands)	2016			2015			2016			2015			2016			2015
Service cost	$	929		$	1,091		$	313		$	741		$	1,242		$	1,832
Interest cost	3,740			3,678			663			1,085			4,403			4,763
Expected return on plan assets	(5,757		)	(5,666		)	—			(608		)	(5,757		)	(6,274		)
Amortization of unrecognized:
Prior service cost	65			104			(53		)	(62		)	12			42
Actuarial loss	1,068			1,823			412			400			1,480			2,223
Pension expense	$	45		$	1,030		$	1,335		$	1,556		$	1,380		$	2,586
Nine months ended September 30,	U.S. Plans						Non-U.S. Plans						Total
(dollars in thousands)	2016			2015			2016			2015			2016			2015
Service cost	$	2,788		$	3,274		$	948		$	2,251		$	3,736		$	5,525
Interest cost	11,222			11,036			2,005			3,295			13,227			14,331
Expected return on plan assets	(17,272		)	(16,996		)	—			(1,844		)	(17,272		)	(18,840		)
Amortization of unrecognized:
Prior service cost	197			313			(160		)	(187		)	37			126
Actuarial loss	3,204			5,468			817			1,215			4,021			6,683
Settlement charge	42			—			170			—			212			—
Pension expense	$	181		$	3,095		$	3,780		$	4,730		$	3,961		$	7,825

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 September 30,	U.S. Plans				Non-U.S. Plans						Total
(dollars in thousands)	2016		2015		2016			2015			2016		2015
Service cost	$	200	$	214	$	—		$	—		$	200	$	214
Interest cost	652		634		11			10			663		644
Amortization of unrecognized:
Prior service cost	35		35		—			—			35		35
Actuarial loss / (gain)	21		148		(10		)	(19		)	11		129
Non-pension postretirement benefit expense	$	908	$	1,031	$	1		$	(9	)	$	909	$	1,022
Nine months ended September 30,	U.S. Plans				Non-U.S. Plans						Total
(dollars in thousands)	2016		2015		2016			2015			2016		2015
Service cost	$	598	$	641	$	1		$	1		$	599	$	642
Interest cost	1,956		1,903		35			39			1,991		1,942
Amortization of unrecognized:
Prior service cost	105		105		—			—			105		105
Actuarial loss / (gain)	61		444		(32		)	(43		)	29		401
Non-pension postretirement benefit expense	$	2,720	$	3,093	$	4		$	(3	)	$	2,724	$	3,090