Income Taxes	3 Months Ended
Mar. 31, 2012
Income Tax Disclosure [Abstract]
Income Taxes	Income taxes Our income tax expense (benefit) for the three months ended March 31, 2012 and 2011 was $(1.8) million and $(5.9) million, respectively. Due to the effects of changes in unrecognized tax benefits and the valuation allowance recorded against our deferred tax assets, our effective tax rates in 2012 and 2011 are not correlated to the amount of pretax loss. The income tax benefits for the three months ended March 31, 2012 and 2011 resulted primarily from the favorable resolution of certain federal and state income tax matters. We had income taxes receivable of $29.7 million and $27.2 million at March 31, 2012 and December 31, 2011, respectively, which related primarily to amended federal and state income tax returns. In accordance with ASC 740, "Income Taxes" ("ASC 740"), the Company evaluates its deferred tax assets to determine if a valuation allowance is required. At March 31, 2012 and December 31, 2011, we had net deferred tax assets of $2.5 billion. Based on our evaluation in accordance with ASC 740, we fully reserved the net deferred tax assets due to the uncertainty of realizing such deferred tax assets. The ultimate realization of these deferred tax assets is dependent upon the generation of taxable income during future periods. Changes in existing tax laws could also affect actual tax results and the valuation of deferred tax assets over time. The accounting for deferred taxes is based upon an estimate of future results. Differences between the estimated and actual results could have a material impact on our consolidated results of operations or financial position. To the extent that our results of operations improve, our deferred tax asset valuation allowance may be reduced. As a result of our merger with Centex Corporation ("Centex") in August 2009, our ability to use certain of Centex’s pre-ownership change NOLs and built-in losses or deductions is limited by Section 382 of the Internal Revenue Code. Our Section 382 limitation is approximately $67.4 million per year for NOLs, losses realized on built-in loss assets that are sold within 60 months of the ownership change (i.e. before August 2014), and certain deductions. The limitation may result in a significant portion of Centex’s pre-ownership change NOL carryforwards and future recognized built-in losses or deductions not being available for use by the Company. At March 31, 2012 we had $179.3 million of gross unrecognized tax benefits and $39.2 million of accrued interest and penalties. We are currently under examination by the IRS and various state taxing jurisdictions and anticipate finalizing certain of the examinations within the next twelve months. The final outcome of these examinations is not yet determinable. It is reasonably possible, within the next twelve months, that unrecognized tax benefits may decrease by up to $19.1 million, excluding interest and penalties, primarily due to expirations of certain statutes of limitations and potential settlements. The statute of limitations for our major tax jurisdictions remains open for examination for tax years 1998 to 2012.

Income Taxes

3 Months Ended

Mar. 31, 2012

Income taxes

Our income tax expense (benefit) for the three months ended March 31, 2012 and 2011 was $(1.8) million and $(5.9) million, respectively. Due to the effects of changes in unrecognized tax benefits and the valuation allowance recorded against our deferred tax assets, our effective tax rates in 2012 and 2011 are not correlated to the amount of pretax loss. The income tax benefits for the three months ended March 31, 2012 and 2011 resulted primarily from the favorable resolution of certain federal and state income tax matters.

We had income taxes receivable of $29.7 million and $27.2 million at March 31, 2012 and December 31, 2011, respectively, which related primarily to amended federal and state income tax returns.

In accordance with ASC 740, "Income Taxes" ("ASC 740"), the Company evaluates its deferred tax assets to determine if a valuation allowance is required. At March 31, 2012 and December 31, 2011, we had net deferred tax assets of $2.5 billion. Based on our evaluation in accordance with ASC 740, we fully reserved the net deferred tax assets due to the uncertainty of realizing such deferred tax assets. The ultimate realization of these deferred tax assets is dependent upon the generation of taxable income during future periods. Changes in existing tax laws could also affect actual tax results and the valuation of deferred tax assets over time. The accounting for deferred taxes is based upon an estimate of future results. Differences between the estimated and actual results could have a material impact on our consolidated results of operations or financial position. To the extent that our results of operations improve, our deferred tax asset valuation allowance may be reduced.

As a result of our merger with Centex Corporation ("Centex") in August 2009, our ability to use certain of Centex’s pre-ownership change NOLs and built-in losses or deductions is limited by Section 382 of the Internal Revenue Code. Our Section 382 limitation is approximately $67.4 million per year for NOLs, losses realized on built-in loss assets that are sold within 60 months of the ownership change (i.e. before August 2014), and certain deductions. The limitation may result in a significant portion of Centex’s pre-ownership change NOL carryforwards and future recognized built-in losses or deductions not being available for use by the Company.

At March 31, 2012 we had $179.3 million of gross unrecognized tax benefits and $39.2 million of accrued interest and penalties. We are currently under examination by the IRS and various state taxing jurisdictions and anticipate finalizing certain of the examinations within the next twelve months. The final outcome of these examinations is not yet determinable. It is reasonably possible, within the next twelve months, that unrecognized tax benefits may decrease by up to $19.1 million, excluding interest and penalties, primarily due to expirations of certain statutes of limitations and potential settlements. The statute of limitations for our major tax jurisdictions remains open for examination for tax years 1998 to 2012.