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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Valuation Allowance [Line Items]
Benefit from income taxes	$ (245)	$ (4,071)	$ (1,356)	$ (7,467)
Valuation Allowance, Operating Loss Carryforwards [Member] \| Domestic Tax Authority [Member]
Valuation Allowance [Line Items]
Valuation allowance	151,000		151,000
Change in amount of valuation allowance				104,600
Valuation Allowance, Operating Loss Carryforwards [Member] \| State and Local Jurisdiction [Member]
Valuation Allowance [Line Items]
Valuation allowance	$ 7,000		$ 7,000
Change in amount of valuation allowance				$ 5,800