Goodwill and Other Intangibles - Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill
Balance at the beginning of the period	$ 12,803
Impairment losses			$ (101)
Balance at the end of the period	11,933	$ 12,803
European Operations
Goodwill
Balance at the beginning of the period	12,803
Currency translation adjustment	(870)	(998)
Balance at the end of the period	$ 11,933	12,803
European Operations | IDS Member
Goodwill
Acquisition		$ 13,801