Defined Benefit Pension Plans Defined Benefit Pension Plans (Tables)

12 Months Ended

Dec. 31, 2016

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

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

The following tables set forth the components of the changes in benefit obligations and fair value of plan assets:

	Year Ended December 31,
	2016			2015
	(in thousands)
Change in benefit obligation:
Benefit obligation at January 1,	$	98,767		$	116,178
Service cost	3,472			4,572
Interest cost	2,573			2,380
Actuarial (gain) loss	7,733			(5,211		)
Benefits paid	(9,481		)	(4,382		)
Foreign currency exchange rate changes	(4,386		)	(12,190		)
Curtailment	14			(1,683		)
Settlement	(1,431		)	—
Other	—			(897		)
Benefit obligation at December 31,	$	97,261		$	98,767
Change in plan assets:
Fair value of plan assets at January 1,	$	9,662		$	10,761
Actual return on plan assets	604			159
Company contributions	348			671
Benefits paid	(370		)	(308		)
Foreign currency exchange rate changes	(29		)	(1,621		)
Fair value of plan assets at December 31,	10,215			9,662
Net pension benefit obligation at fair value	$	87,046		$	89,105

Schedule of Amounts Recognized in the Consolidated Balance Sheets [Table Text Block]

Amounts recognized on the Consolidated Balance Sheets consist of:

	At December 31,
	2016		2015
	(in thousands)
Assets
Plan assets in other long-term assets	$	654	$	359
Liabilities
Current portion of pension benefit obligation in wages and benefits payable	3,202		3,493
Long-term portion of pension benefit obligation	84,498		85,971
Pension benefit obligation, net	$	87,046	$	89,105

Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block]

Amounts in AOCI (pre-tax) that have not yet been recognized as components of net periodic benefit costs consist of:

	At December 31,
	2016		2015
	(in thousands)
Net actuarial loss	$	26,767	$	24,687
Net prior service cost	619		706
Amount included in AOCI	$	27,386	$	25,393

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

Amounts recognized in OCI (pre-tax) are as follows:

	Year Ended December 31,
	2016			2015			2014
	(in thousands)
Net actuarial (gain) loss	$	6,316		$	(6,894	)	$	25,838
Settlement/curtailment loss	(1,343		)	(336		)	(55		)
Plan asset (gain) loss	(64		)	343			129
Amortization of net actuarial loss	(1,351		)	(1,979		)	(572		)
Amortization of prior service cost	(58		)	(59		)	(138		)
Other	4			(46		)	68
Other comprehensive (income) loss	$	3,504		$	(8,971	)	$	25,270

Schedule of Net Periodic Pension Benefit Costs [Table Text Block]

Net periodic pension benefit costs for our plans include the following components:

	Year Ended December 31,
	2016			2015			2014
	(in thousands)
Service cost	$	3,472		$	4,572		$	3,559
Interest cost	2,573			2,380			3,476
Expected return on plan assets	(540		)	(502		)	(619		)
Amortization of prior service costs	58			59			138
Amortization of actuarial net loss	1,351			1,979			572
Settlements and other	1,340			420			55
Net periodic pension benefit costs	$	8,254		$	8,908		$	7,181

Schedule of Assumptions Used [Table Text Block]

The significant actuarial weighted average assumptions used in determining the benefit obligations and net periodic benefit cost for our benefit plans are as follows:

	At and For The Year Ended December 31,
	2016		2015		2014
Actuarial assumptions used to determine benefit obligations at end of period:
Discount rate	2.18	%	2.59	%	2.36	%
Expected annual rate of compensation increase	3.65	%	3.60	%	3.37	%
Actuarial assumptions used to determine net periodic benefit cost for the period:
Discount rate	2.59	%	2.36	%	3.76	%
Expected rate of return on plan assets	5.29	%	5.45	%	5.40	%
Expected annual rate of compensation increase	3.60	%	3.37	%	3.33	%

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

The total obligations and fair value of plan assets for plans with projected benefit obligations and accumulated benefit obligations exceeding the fair value of plan assets are as follows:

	At December 31,
	2016		2015
	(in thousands)
Projected benefit obligation	$	94,110	$	95,814
Accumulated benefit obligation	84,448		86,534
Fair value of plan assets	6,410		6,502

Fair values of the assets held by the postretirement benefits plans by asset category [Table Text Block]

The fair values of our plan investments by asset category are as follows:

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Unobservable Inputs (Level 3)
	(in thousands)
	December 31, 2016
Cash	$	783	$	783	$	—
Insurance funds	7,011		—		7,011
Other securities	2,421		—		2,421
Total fair value of plan assets	$	10,215	$	783	$	9,432
	December 31, 2015
Cash	$	795	$	795	$	—
Insurance funds	7,089		—		7,089
Other securities	1,778		—		1,778
Total fair value of plan assets	$	9,662	$	795	$	8,867

Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]

The following tables present a reconciliation of Level 3 assets held during the years ended December 31, 2016 and 2015.

	Balance at January 1, 2016		Net Realized and Unrealized Gains		Net Purchases, Issuances, Settlements, and Other			Net Transfers Into Level 3		Effect of Foreign Currency			Balance at December 31, 2016
	(in thousands)
Insurance funds	$	7,089	$	235	$	54		$	—	$	(367	)	$	7,011
Other securities	1,778		405		(84		)	—		322			2,421
Total	$	8,867	$	640	$	(30	)	$	—	$	(45	)	$	9,432

	Balance at January 1, 2015		Net Realized and Unrealized Gains		Net Purchases, Issuances, Settlements, and Other			Net Transfers Into Level 3		Effect of Foreign Currency			Balance at December 31, 2015
	(in thousands)
Insurance funds	$	7,440	$	49	$	372		$	—	$	(772	)	$	7,089
Other securities	2,595		44		(82		)	—		(779		)	1,778
Total	$	10,035	$	93	$	290		$	—	$	(1,551	)	$	8,867

Schedule of Expected Benefit Payments [Table Text Block]

Annual benefit payments for the next 10 years, including amounts to be paid from our assets for unfunded plans, and reflecting expected future service, as appropriate, are expected to be paid as follows:

Year Ending December 31,	Estimated Annual Benefit Payments
	(in thousands)
2017	$	3,655
2018	2,662
2019	2,737
2020	3,285
2021	3,918
2022-2026	22,929