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Income Taxes - Table 2 (Details)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Effective Income Tax Rate Reconciliation      
Tax expense at statutory rate 35.00% 35.00% 35.00%
Increase (decrease) in tax rate resulting from:      
State income taxes, net of federal tax benefit 3.00% 4.70% 4.00%
Decrease in valuation allowance (11.60%) (431.50%) (22.30%)
Settlement of tax claims (7.20%) 13.20% (6.60%)
Noncontrolling interests (6.50%) (8.30%) (10.80%)
Adjustments to net operating loss carryforwards 2.90% 0.00% 0.00%
Interest, net (1.60%) (0.80%) (1.20%)
Other, net 1.30% (2.40%) (0.80%)
Income tax expense (benefit) 15.30% (390.10%) (2.70%)