Income Taxes - Additional Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	35.00%	35.00%	35.00%
Operating loss carry forwards, federal	$ 0	$ 76,800,000
Operating loss carry forwards, state	323,900,000	593,100,000
Operating loss carry forwards, expiration year	2031
Deferred tax assets, valuation allowance	6,176,000	93,058,000
Deferred Tax Assets, Net	(34,824,000)	12,866,000
Valuation allowance, decrease	86,900,000
Operating loss carryforwards, valuation allowance		8,400,000
Valuation Allowance recorded in accumulated comprehensive income	0	2,100,000
Unrecognized tax benefits	$ 1,700,000	$ 1,700,000