Long-Term Liabilities (Schedule of Long-Term Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Long-Term Liabilities [Abstract]
Indemnification liabilities	$ 338	$ 357
Deferred tax liability		6
Liabilities for uncertain tax positions	69,333	68,658	$ 70,022	$ 69,511
Other	238	238
Long term liabilities	$ 69,909	$ 69,259