Income Taxes Other information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax (Textual) [Abstract]
Income taxes paid	$ 1,300	$ 300
Operating Loss Carryforwards [Line Items]
Interest Paid	1,000	600
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	20,200	13,000
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	20,500
Undistributed Earnings of Foreign Subsidiaries		(8,400)
Goodwill	20,079	19,614	$ 5,520
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	4,255	3,249
Additions for tax positions of current year	43	865
Additions for tax positions of prior years	85	141
Reductions for tax positions of prior years	(771)	0
Balance at end of year	$ 3,612	$ 4,255