Goodwill and Other Intangible Assets Goodwill Roll Forward (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Balance	$ 62,030	$ 61,888
Currency exchange rate adjustment	(102)	142
Balance	61,928	62,030
Direct
Goodwill [Roll Forward]
Balance	2,335	2,180
Currency exchange rate adjustment	(105)	155
Balance	2,230	2,335
Retail
Goodwill [Roll Forward]
Balance	59,695	59,708
Currency exchange rate adjustment	3	(13)
Balance	$ 59,698	$ 59,695