Income Taxes Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%
Effective Income Tax Rate Reconciliation, Percent	44.50%
Deferred Tax Assets, Valuation Allowance	$ 256,619,000	$ 161,026,000
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax	2,500,000
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	75,400,000
Deferred Tax Assets, Tax Credit Carryforwards, General Business	18,200,000
Excess tax benefits from employee stock plan exercises	55,200,000
Tax effect of excess benefits from employee stock plan exercises, which will increase our common stock when it reduces our cash taxes payable, and which is not recognized in our deferred tax assets	20,400,000
Undistributed Earnings of Foreign Subsidiaries and Foreign Corporate Joint Ventures [Member]
Undistributed Earnings of Foreign Subsidiaries	$ 31,400,000	$ 22,500,000