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Income Taxes
 6 Months Ended
Jun. 30, 2011
Income Taxes [Abstract]  
Income Taxes
13. Income Taxes
 
We and our subsidiaries are subject to U.S. federal income tax as well as income tax of numerous state and foreign jurisdictions. We are generally no longer subject to U.S. federal tax examinations for taxable years before 2007 and with limited exceptions, state and foreign income tax examinations for taxable years before 2004.
 
We recognize potential accrued interest and penalties related to unrecognized tax benefits in Income Tax Expense. Included in the net liability of $5,674 for unrecognized tax benefits as of June 30, 2011 was approximately $532 for accrued interest and penalties. The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate as of June 30, 2011 was $4,290. To the extent interest and penalties are not assessed with respect to uncertain tax positions, amounts accrued will be revised and reflected as an adjustment of the Income Tax Expense.
 
Unrecognized tax benefits were reduced by $128 during the first six months of 2011 for expiration of the statute of limitations in various jurisdictions.
 
We are currently undergoing income tax examinations in various state and foreign jurisdictions covering 2004 to 2008 for which settlement is expected prior to year end. Although the final outcome of these examinations cannot be currently determined, we believe that we have adequate reserves with respect to these examinations.