Restructuring (Restructuring Reserve) (Details) - Reorganization of European Operations [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2014
Restructuring Reserve [Roll Forward]
Balance	$ 581
Expenses, Net	0
Cash	(22)
Noncash	(3)
Balance	556
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Balance	523
Expenses, Net	0
Cash	0
Noncash	0	$ (500)
Balance	523
European Leases and Equipment Write-Off [Member]
Restructuring Reserve [Roll Forward]
Balance	58
Expenses, Net	0
Cash	(22)
Noncash	(3)
Balance	$ 33