Income Taxes (Additional Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes [Line Items]
Operating Loss Carryforwards	$ 150,926
Tax Credit Carryforward, Limitations on Use	The NOLs available post-merger that the Company completed in 2012 that are not subject to limitation amount to $134,463. The remaining NOLs of $39,601 are subject to the limitation of Section 382.
Deferred Tax Assets, Valuation Allowance	$ 48,748	$ 41,209	$ 58,914
Annual Limitation on Net Operating Loss Carryforwards	$ 2,000
Net Operating Loss Expiration	20 years
Operating Loss Carry forwards Without Limitation	$ 23,139