Income Taxes (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Operating Loss Carryforwards [Line Items]
Federal statutory tax rate (as a percent)	38.00%
Change in valuation allowance	$ 0	$ 0
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryovers	129,200,000
Tax Credit Carryforward, Amount	12,900,000
State income tax carryforwards	12,900,000
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryovers	233,500,000
Tax Credit Carryforward, Amount	10,800,000
State income tax carryforwards	$ 10,800,000