Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible assets not subject to amortization	$ 13,849	$ 24,054
Cost of additions reduced by recognition of tax credits	$ 1,678
Interest costs, weighted average rate	6.39%
Weighted average amortization period	7 years 10 months 24 days	7 years 10 months 24 days	8 years 8 months 12 days
Capitalized cost of software under development	$ 772	$ 1,258