Income Taxes Table 4 (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Reconciliation of unrecognized tax benefits
Balance at January 1	$ 2,944	$ 2,048
Additions to tax provisions related to the current year	443	163
Additions to tax positions related to prior years	4	1,210
Reduction to tax positions related to prior years	(508)	(121)
Lapses on statutes of limitations	0	(356)
Balance at December 31	$ 2,883	$ 2,944

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

No definition available.

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Amount of unrecognized tax benefits.

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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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