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Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2014

Compensation and Retirement Disclosure [Abstract]

Schedule of Changes in Projected Benefit Obligations [Table Text Block]

A December 31 measurement date is used for all of the defined benefit and postretirement plans. The status of these plans as of December 31, 2014 and 2013 is summarized below (dollars in thousands):

		December 31,
		Pension Benefits								Other Benefits
		2014				2013				2014				2013
Change in benefit obligation:
Benefit obligation at beginning of year		$	111,195			$	112,759			$	30,759			$	33,953
Service cost		8,121				8,023				2,354				1,881
Interest Cost		4,972				4,072				1,962				1,353
Participant contributions		—				—				174				128
Actuarial (gains) losses		18,930				(8,957		)		25,354				(5,949		)
Benefits paid		(3,044		)		(3,347		)		(821		)		(607		)
Foreign currency rate change effect		(1,978		)		(1,355		)		—				—
Benefit obligation at end of year		$	138,196			$	111,195			$	59,782			$	30,759

Schedule of Changes in Fair Value of Plan Assets [Table Text Block]

		December 31,
		Pension Benefits								Other Benefits
		2014				2013				2014				2013
Change in plan assets:
Fair value of plan assets at beginning of year		$	59,559			$	49,516			$	—			$	—
Actual return on plan assets		2,489				6,027				—				—
Employer contributions		7,753				7,363				647				479
Participant contributions		—				—				174				128
Benefits paid and expenses		(3,044		)		(3,347		)		(821		)		(607		)
Fair value of plan assets at end of year		$	66,757			$	59,559			$	—			$	—
Funded status at end of year		$	(71,439	)		$	(51,636	)		$	(59,782	)		$	(30,759	)

Schedule of Net Funded Status [Table Text Block]

		December 31,
		Qualified Plans								Non-Qualified Plans(1)								Total
		2014				2013				2014				2013				2014				2013
Aggregate fair value of plan assets		$	66,757			$	59,559			$	—			$	—			$	66,757			$	59,559
Aggregate projected benefit obligations		80,104				63,502				58,092				47,693				138,196				111,195
Under funded		$	(13,347	)		$	(3,943	)		$	(58,092	)		$	(47,693	)		$	(71,439	)		$	(51,636	)

(1) For non-qualified plans, there are no required funding levels.

Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

	December 31,
	Pension Benefits								Other Benefits
	2014				2013				2014				2013
Amounts recognized in accumulated other comprehensive income:
Net actuarial loss	$	41,238			$	22,507			$	32,949			$	8,655
Net prior service cost	1,496				1,981				—				—
Total	$	42,734			$	24,488			$	32,949			$	8,655

Schedule Of Projected Benefit Obligations In Excess Of Fair Value Of Plan Assets [Table Text Block]

The following table presents information for qualified and non-qualified pension plans with a projected benefit obligation in excess of plan assets as of December 31, 2014 and 2013 (dollars in thousands):

		2014				2013
Projected benefit obligation		$	138,196			$	111,195
Fair value of plan assets		66,757				59,559

Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]

The following table presents information for pension plans with an accumulated benefit obligation in excess of plan assets as of December 31, 2014 and 2013 (dollars in thousands):

		2014				2013
Accumulated benefit obligation		$	135,850			$	107,722
Fair value of plan assets		66,757				59,559

Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

The components of net periodic benefit cost and other changes in plan assets and benefit obligations recognized in other comprehensive income were as follows (dollars in thousands):

		Pension Benefits												Other Benefits
		2014				2013				2012				2014				2013				2012
Net periodic benefit cost:
Service cost		$	8,121			$	8,023			$	7,531			$	2,354			$	1,881			$	1,641
Interest cost		4,972				4,072				4,072				1,962				1,353				1,246
Expected return on plan assets		(4,471		)		(3,734		)		(3,066		)		—				—				—
Amortization of prior actuarial losses		1,755				3,270				3,439				1,060				868				743
Amortization of prior service cost		333				373				376				—				—				—
Settlements		—				—				841				—				—				—
Net periodic benefit cost		10,710				12,004				13,193				5,376				4,102				3,630
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Net actuarial (gains) losses		20,912				(11,250		)		10,888				25,354				(5,949		)		2,341
Prior service cost		—				—				—				—				—				—
Amortization of actuarial (gains) losses		(1,755		)		(3,270		)		(3,439		)		(1,060		)		(868		)		(743		)
Amortization of prior service cost (credit)		(333		)		(373		)		(376		)		—				—				—
Settlements		—				—				(841		)		—				—				—
Foreign exchange translations and other adjustments		(578		)		(439		)		219				—				—				—
Total recognized in other comprehensive income		18,246				(15,332		)		6,451				24,294				(6,817		)		1,598
Total recognized in net periodic benefit cost and other comprehensive income		$	28,956			$	(3,328	)		$	19,644			$	29,670			$	(2,715	)		$	5,228

Schedule of Expected Benefit Payments [Table Text Block]

The following benefit payments, which reflect expected future service as appropriate, are expected to be paid (dollars in thousands):

		Pension Benefits				Other Benefits
2015		$	6,423			$	567
2016		9,897				703
2017		7,828				814
2018		7,979				970
2019		9,509				1,104
2020-2024		50,896				7,720

Schedule of Assumptions Used [Table Text Block]

Weighted average assumptions used to determine the accumulated benefit obligation and net benefit cost or income for the year ended December 31:

		Pension Benefits									Other Benefits
		2014			2013			2012			2014			2013			2012
Discount rate used to determine benefit obligation		3.90	%		4.45	%		3.80	%		4.05	%		5.05	%		4.15	%
Discount rate used to determine net benefit cost or income		4.30	%		3.83	%		4.12	%		5.05	%		4.15	%		4.50	%
Expected long-term rate of return on plan assets		7.35	%		7.35	%		7.75	%		—	%		—	%		—	%
Rate of compensation increases		4.08	%		4.21	%		4.20	%		—	%		—	%		—	%

Schedule of Health Care Cost Trend Rates [Table Text Block]

The assumed health care cost trend rates used in measuring the accumulated non-pension post-retirement benefit obligation were as follows:

		December 31,
		2014		2013
Pre-Medicare eligible claims		8% down to 5% in 2018		9% down to 5% in 2017
Medicare eligible claims		8% down to 5% in 2018		9% down to 5% in 2017

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]

A one-percentage point change in assumed health care cost trend rates would have the following effects (dollars in thousands):

		One Percent Increase				One Percent Decrease
Effect on total of service and interest cost components		$	1,232			$	(881	)
Effect on accumulated postretirement benefit obligation		$	14,912			$	(11,081	)

Schedule of Allocation of Plan Assets [Table Text Block]

The fair values of the Company’s pension plan assets as of December 31, 2014 and 2013 are summarized below (dollars in thousands):

		December 31, 2014
						Fair Value Measurement Using:
		Total				Level 1				Level 2				Level 3
Mutual Funds(1)		$	66,675			$	66,675			$	—			$	—
Cash		82				82				—				—
Total		$	66,757			$	66,757			$	—			$	—

(1) Mutual funds were invested 32% in U.S. equity funds, 30% in U.S. fixed income funds, 22% in non-U.S. equity funds and 16% in other.

		December 31, 2013
						Fair Value Measurement Using:
		Total				Level 1				Level 2				Level 3
Mutual Funds(2)		$	59,485			$	59,485			$	—			$	—
Cash		74				74				—				—
Total		$	59,559			$	59,559			$	—			$	—

(2) Mutual funds were invested 33% in U.S. equity funds, 26% in U.S. fixed income funds, 25% in non-U.S. equity funds and 16% in other.

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Tabular disclosure of projected benefit obligations and fair values of plan assets of pension plans and/or other employee benefit plans where the projected benefit obligation exceeds the fair value of plan assets.

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