Other Employee Benefit Plans Other Employee Benefit Plans (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Change in benefit obligation:
Benefit obligation at January 1	$ 12,551	$ 24,932
Service costs	166us-gaap_DefinedBenefitPlanServiceCost	254us-gaap_DefinedBenefitPlanServiceCost	267us-gaap_DefinedBenefitPlanServiceCost
Interest costs	444us-gaap_DefinedBenefitPlanInterestCost	883us-gaap_DefinedBenefitPlanInterestCost	936us-gaap_DefinedBenefitPlanInterestCost
Actuarial loss (gain)	890	(296)
Benefits paid	(1,338)us-gaap_DefinedBenefitPlanBenefitsPaid	(13,292)us-gaap_DefinedBenefitPlanBenefitsPaid
Foreign currency exchange changes	(900)	70
Benefit obligation at December 31	11,813	12,551	24,932
Fair value of plan assets at December 31	0	0
Unfunded status at December 31	11,813	12,551
Amounts recognized in the Consolidated Balance Sheets:
Current liabilities	335	383
Non-current liabilities	$ 11,478	$ 12,168
Supplemental Executive Retirement Plan (SERP)
Net periodic benefit cost:
Discount rate	4.75%	3.75%
Rate of increase in compensation levels	3.00%	3.00%
Funded status and projected benefit obligation:
Discount rate	3.75%	4.75%
Rate of increase in compensation levels	3.00%	3.00%
Defined benefit pension plan for employees outside the United States
Net periodic benefit cost:
Discount rate	1.90%	3.50%
Funded status and projected benefit obligation:
Discount rate	1.90%	3.50%

Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.

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

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Expected rate of compensation increases (for pay-related plans).

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

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Expected rate of compensation increases (for pay-related plans).

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1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

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The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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Amount of gain (loss) from foreign currency exchange rate changes for benefit obligation for plans of a foreign operation whose functional currency is not the reporting currency.

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The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

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The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

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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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