Income Taxes Effective Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
State taxes, net of federal benefit	1.00%	(0.50%)	(8.10%)
Foreign losses not benefited	0.00%	0.00%	(0.30%)
Changes in tax reserves	(0.30%)	0.20%	(78.60%)
Change in valuation allowance	(24.80%)	30.30%	(28.10%)
Permanent differences	(4.70%)	(64.60%)	(1.80%)
Foreign tax refund	(0.00%)	6.50%	(0.00%)
Other	(0.10%)	(1.70%)	(0.60%)
Effective income tax rate	6.10%	5.20%	(82.50%)