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Income Taxes - Rollforward of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Beginning balance	$ 6,965	$ 5,560
Increases related to positions taken during prior years	0	470
Increases related to positions taken during the current year	1,569	1,170
Decreases related to positions settled with tax authorities	0	0
Decreases as a result of a lapse of applicable statute of limitations	(456)	(664)
Ending balance	8,078	6,536
The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate	$ 8,023	$ 6,536	$ 6,900

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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