Income Tax (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income tax expense	$ 700	$ 420	$ 1,474	$ 1,164
Net loss before income tax	(531)	$ (6,141)	(12,601)	$ (23,240)
Unrecognized tax benefits	6,800		6,800		$ 5,500
Unrecognized tax benefits that would impact effective tax rate	5,700		5,700
Effect on income tax expense net of valuation allowance	$ 700		$ 700