v2.4.0.6
Income Taxes (Effective Income Tax Rate Reconciliation) (Details)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Income Taxes [Abstract]      
Statutory federal tax rate 35.00% 35.00% 35.00%
State taxes, net of federal benefit 2.30% (15.00%) 3.50%
Nondeductible items (5.70%) (35.20%) 8.20%
Foreign rate differences (5.40%) (40.70%) 2.00%
Change in statutory tax rates (0.60%)    
Change in valuation allowance (8.90%) 139.00% 6.90%
Stock compensation shortfalls 0.00% (18.90%) 7.70%
True-ups and other adjustments 0.10% (31.60%) (1.00%)
Tax credits 0.00%   (3.20%)
Foreign tax withholding (0.60%) (11.00%)  
Uncertain tax positions (0.30%) (11.50%) 0.80%
Effective tax rate 15.90% 10.10% 59.90%