Segment and Related Information, Reconciliation of Segment Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Identifiable assets by business segment [Abstract]
Identifiable assets	$ 115,312	$ 115,178
United States [Member] | Reportable Geographical Components [Member]
Identifiable assets by business segment [Abstract]
Identifiable assets	100,021	93,825
Other Countries [Member] | Reportable Geographical Components [Member]
Identifiable assets by business segment [Abstract]
Identifiable assets	$ 15,291	$ 21,353