Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Abstract]
Goodwill	$ 20,079	$ 19,614	$ 5,520
Goodwill, Acquired During Period	2,086
Goodwill, Translation and Purchase Accounting Adjustments	(1,452)	(9)
Goodwill, Purchase Accounting Adjustments	$ (169)	$ (73)