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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]
Income tax expense	$ 2,088	$ 1,415	$ 1,922	$ 1,121
Effective tax rate	8.40%	23.20%	8.00%	18.90%
Unrecognized tax benefits	$ 5,700		$ 5,700
Unrecognized tax benefits that would impact effective rate	5,400		5,400
Accrued interest and penalties	$ 600		$ 600		$ 500

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- Definition

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

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

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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