Income Taxes (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2015	Dec. 31, 2014
Income Taxes
Benefit from income taxes	$ 4,389,000
NOL carryforwards
Percentage Company is resident of NJ			100
Unrecognized tax benefits disclosures
Unrecognized tax benefits, interest and penalties accrued		0
Unrecognized tax benefits, reserves		0	0
IRS
NOL carryforwards
Net operating loss carryforwards for income tax purposes			461,800,000
Net operating loss carryforwards available to offset future taxable income			283,500,000
Ownership change, as defined in Section 382, which could limit utilization of NOLs (as a percent)		50.00%
Period of time for measuring ownership changes under Section 382		3 years
New Jersey
NOL carryforwards
Cash proceeds from sale of NOLs, net of commissions	4,400,000
Net operating loss carryforwards available to offset future taxable income			$ 63,000,000