Income Taxes (Details Textuals) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement Income Taxes Details [Abstract]
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate	35.00%
Deferred Tax Assets, Valuation Allowance	$ 161,500,000	$ 363,400,000
Total change in valuation allowance	201,900,000
Change in valuation allowance - earnings	199,038,000	81,923,000	(446,148,000)
Change in valuation allowance - equity	2,900,000
U.S. federal alternative minimum tax credits	14,100,000
Deferred Tax Assets Tax Credit Carryforwards General Business	500,000
Foreign tax credit carryforward	1,700,000
Deferred Tax Assets Operating Loss Carryforwards Domestic Total	214,900,000	260,100,000
Deferred Tax Assets Operating Loss Carryback Domestic		54,500,000
Income Tax Receivable		8,000,000
Deferred Tax Assets Operating Loss Carryforwards Domestic	420,900,000
State tax net operating loss carryforwards	798,400,000
Canadian Operating Loss	23,800,000
Income taxes receivable - Canada	$ 6,200,000