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Benefit Plans Textuals (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan Fair Value of Plan Assets, including Assets recorded at Net Asset Value	$ 820,272	$ 844,715	$ 883,223
Defined Contribution Cost	15,400	16,000	15,600
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	164,823	158,944
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	4,852	5,083
Aggregate Projected Benefit Obligation	214,100
Aggregate Accumulated Benefit Obligation	203,500
Aggregate Fair Value of Plan Assets	81,400
Defined Benefit Plan, Settlements, Benefit Obligation	14,600
Other Comprehensive Income (Loss), Finalization of Pension and Other Postretirement Benefit Plan Valuation, before Tax	8,189	0	0
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	(7,963)	0	0
Defined Benefit Plan, Settlement Loss after tax	4,900
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan Fair Value of Plan Assets, including Assets recorded at Net Asset Value	104,103	119,118	$ 132,030
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	33,960	35,205
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	92	92
Defined Benefit Plan, Accumulated Benefit Obligation	$ 138,200	$ 154,400
Discount Rate	3.97%	4.27%	4.00%
Discount Rate	4.27%	4.00%	4.75%
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	$ (7,963)	$ 0	$ 0
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan Fair Value of Plan Assets, including Assets recorded at Net Asset Value	716,169	725,597	$ 751,193
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	128,345	120,950
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	4,293	4,508
Defined Benefit Plan, Accumulated Benefit Obligation	$ 818,900	$ 803,300
Discount Rate	0.98%	1.31%	1.65%
Discount Rate	1.31%	1.65%	2.73%
Estimated Future Employer Contributions in Next Fiscal Year	$ 18,900
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	0	$ 0	$ 0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan Fair Value of Plan Assets, including Assets recorded at Net Asset Value	0	0	$ 0
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	2,518	2,789
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	$ 467	$ 483
Discount Rate	3.41%	3.54%	4.00%
Discount Rate	3.54%	4.00%	4.75%
Healthcare Cost Trend Rate Maximum	7.50%	8.50%	7.75%
Healthcare Cost Trend Rate Minimum	8.00%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	5.00%
Estimated Future Employer Contributions in Next Fiscal Year		$ 500
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	$ 0	$ 0	$ 0
Debt Securities [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Equity Securities, Range Minimum	18.00%
Equity Securities, Range Maximum	28.00%
Debt Securities [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Equity Securities, Range Minimum	35.00%
Equity Securities, Range Maximum	55.00%
Equity Securities [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Equity Securities, Range Minimum	35.00%
Equity Securities, Range Maximum	55.00%
Equity Securities [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Equity Securities, Range Minimum	24.00%
Equity Securities, Range Maximum	45.00%
Other [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Equity Securities, Range Minimum	20.00%
Equity Securities, Range Maximum	40.00%
Other [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Equity Securities, Range Minimum	15.00%
Equity Securities, Range Maximum	25.00%

X

- Definition

Fair value and NAV of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees.

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Amount of net gain (loss) recognized in net periodic benefit cost due to settlements and curtailments. Curtailments result from an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services. Settlements result from an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits.

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The maximum in a range of medical and prescription drug health care cost trend rates used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

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For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

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The interest rate used to adjust for the time value of money for the plan.

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The interest rate used to adjust for the time value of money.

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- Definition

If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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If aggregate disclosures are presented, the aggregate projected benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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Amount of net gain (loss) recognized in net periodic benefit cost due to settlements and curtailments. Curtailments result from an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services. Settlements result from an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits.

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The amount of decrease that relates to an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include (a) making lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and (b) purchasing nonparticipating annuity contracts.

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Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis.

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Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis.

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The ultimate trend rate for health care costs.

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Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position.

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The amount of the cost recognized during the period for defined contribution plans.

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Amount before tax of gain (loss) adjustment to other comprehensive income (loss) resulting from settlement or curtailment of defined benefit pension and other postretirement defined benefit plans.

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For a classified balance sheet, the amount recognized in balance sheet as a current liability associated with an underfunded defined benefit plan.

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This represents the noncurrent liability for underfunded plans recognized in the balance sheet that is associated with the defined benefit pension plans and other postretirement defined benefit plans.

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