Income Taxes Other information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	$ 590	$ 1,036
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	13,100
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	16,800
Undistributed Earnings of Foreign Subsidiaries		3,900	$ (8,400)
Goodwill	20,923	20,079	$ 19,614
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	(475)	0
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	3,612	4,255
Additions for tax positions of current year	13	43
Additions for tax positions of prior years	121	85
Reductions for tax positions of prior years	(29)	(771)
Balance at end of year	$ 3,242	$ 3,612