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International Retirement Plan (Reconciliation of Amounts Recognized in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Retirement Benefits, Description [Abstract]
Current year actuarial gain (loss)	$ (276)	$ 555
Amortization of prior years' unrecognized loss	177	244
Tax benefit (provision)	88	(247)
Total recognized as accumulated other comprehensive income (loss)	$ 188	$ 552

X

- Definition

Defined benefit plan accumulated other comprehensive income net gains losses, tax

+ References

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- Definition

Amount, after tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Amount, before tax, after reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.

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