Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Net operating loss carryforwards	$ 9,506	$ 10,787
Total long-term deferred tax asset	9,506	10,787
Valuation allowances	(1,285)	(869)
Total deferred tax assets	8,221	9,918
Deferred tax liabilities:
Fixed assets	(3,896)	(4,480)
Intangible assets	(15,797)	(20,693)
Other	(441)	(716)
Total long-term liability	(20,134)	(25,889)
Total deferred tax liabilities	(20,134)	(25,889)
Total net deferred tax liability	$ (11,913)	$ (15,971)