v2.4.0.8
Income Taxes (Tax Rate Reconciliation) (Details)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]      
Federal statutory rate 34.00% 34.00% 34.00%
State taxes 4.90% 5.40% 3.50%
Stock-based compensation 8.70% 22.40% 19.40%
Foreign source income 0.50% (4.10%) 1.40%
Change in valuation allowance (27.30%) (46.90%) (44.00%)
Other 2.70% 2.80% 3.30%
Provision for income taxes 23.50% 13.60% 17.60%