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Income Taxes - Unrecognized tax benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of the total amounts of unrecognized tax benefits
Unrecognized tax benefit, beginning of year	$ 638	$ 872
Additions based on tax positions related to prior years	1,222	80
Reductions for tax positions related to prior years	(86)	(39)
Lapse of statute of limitations	(11)	(275)
Unrecognized tax benefit, end of year	1,763	638
Impact on effective tax rate if recognized	1,733	627
Interest expense and penalties related to income taxes	101	8
Accrued interest and penalties	$ 362	$ 252

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Amount of unrecognized tax benefits.

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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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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Amount of expense 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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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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

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