Goodwill (Goodwill rollforward) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Balance, beginning of period	$ 23,599	$ 25,978
Foreign currency translation adjustments	36	(2,379)
Balance, end of period	$ 23,635	$ 23,599