Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Income Taxes [Abstract]
Gross Deferred Income Tax Expense (Benefit)	$ 13,200
Deferred Income Tax Expense (Benefit)	934	$ (79,237)
Deferred income tax assets [Abstract]
Valuation allowance	135,800		$ 121,600
Valuation Allowance, Deferred Tax Asset, Change in Amount	$ 14,200
Internal Revenue Service (IRS) [Member] | Minimum [Member]
Income Tax Examination [Line Items]
Tax years open for future examination	2012
Internal Revenue Service (IRS) [Member] | Maximum [Member]
Income Tax Examination [Line Items]
Tax years open for future examination	2014