Income Taxes (Effective Income Tax Expense (Benefit) Rate) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax [Line Items]
Federal statutory tax expense (benefit) rate	35.00%	35.00%	(35.00%)
State tax expense (benefit), net of federal benefit	(69.80%)	3.20%	6.50%
Depletion in excess of basis	(14.70%)	(0.20%)	0.00%
Effective Income Tax Rate Reconciliation, Tax Settlements, Domestic	0.00%	(4.70%)	0.00%
Valuation allowances	89.80%	(30.30%)	57.10%
Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance Due To Reconsolidation	0.00%	0.00%	(36.00%)
Effective Income Tax Rate Reconciliation Change in Deferred Tax Assets, Valuation Allowance Due to Foreign Taxes	(19.80%)	(8.20%)	0.00%
Foreign taxes	(10.80%)	3.70%	(0.90%)
Intraperiod allocation	4.50%	4.60%	19.90%
Bankruptcy settlement	0.00%	0.00%	(15.70%)
Change in unrecognized tax benefits	(30.10%)	5.10%	(6.60%)
Effective Income Tax Rate Reconciliation Nondeductible Expense Disallowed Compensation	11.70%	0.40%	0.30%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent	8.60%	0.20%	0.10%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent	3.30%	0.30%	0.40%
Permanent differences and other items	4.80%	(0.40%)	(0.50%)
Effective income tax expense (benefit) rate	12.50%	8.70%	(10.40%)