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Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Effective tax rate	57.00%	55.00%	40.00%	57.00%
Unrecognized deferred tax liability related to undistributed earnings of non-U.S. subsidiaries	$ 463		$ 463
Decrease in unrecognized tax benefits due to settlements with tax authority			390
Total unrecognized tax benefits	198		198
Accrued interest and penalties	$ 510		$ 510		$ 651

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Accrued interest and penalties related to uncertain tax positions.

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Amount of deferred tax liability not recognized because of the exceptions to comprehensive recognition of deferred taxes related to undistributed earnings of foreign subsidiaries.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of unrecognized tax benefits.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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