Income Taxes	6 Months Ended
Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income taxes Our effective tax rate is affected by a number of factors, including changes to the valuation allowance related to our deferred tax assets, tax law changes or other circumstances that impact the value of our deferred tax assets, and changes in our unrecognized tax benefits. For the six months ended June 30, 2015 and 2014, our effective tax rate exceeded our blended statutory tax rate due to the effects of these factors. The accounting for deferred taxes is based upon estimates of future results. Differences between estimated and actual results could result in changes in the valuation of our deferred tax assets that could have a material impact on our consolidated results of operations or financial position. Changes in existing tax laws could also affect actual tax results and the realization of deferred tax assets over time. During the six months ended June 30, 2015 and 2014, we recorded adjustments to our deferred tax assets resulting from changes in our prospective effective tax rate resulting from certain states enacting changes to tax laws along with other factors. The estimated impact of such changes was recorded to income tax expense during the respective periods. We evaluate our deferred tax assets each period to determine if a valuation allowance is required based on whether it is "more likely than not" that some portion of the deferred tax assets would not be realized. The ultimate realization of these deferred tax assets is dependent upon the generation of sufficient taxable income during future periods. We conduct our evaluation by considering all available positive and negative evidence. This evaluation considers, among other factors, historical operating results, forecasts of future profitability, the duration of statutory carryforward periods, and the outlooks for the U.S. housing industry and broader economy. Unrecognized tax benefits represent the difference between tax positions taken or expected to be taken in a tax return and the benefits recognized for financial statement purposes. At both June 30, 2015 and December 31, 2014, we had $32.9 million of gross unrecognized tax benefits and $17.3 million of related accrued interest and penalties. It is reasonably possible within the next twelve months that our gross unrecognized tax benefits may decrease by up to $14.7 million, excluding interest and penalties, primarily due to expirations of certain statutes of limitations and potential settlements. 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. The statutes of limitation for our major tax jurisdictions generally remain open for examination for tax years 2004 to 2015.

Income taxes

Our effective tax rate is affected by a number of factors, including changes to the valuation allowance related to our deferred tax assets, tax law changes or other circumstances that impact the value of our deferred tax assets, and changes in our unrecognized tax benefits. For the six months ended June 30, 2015 and 2014, our effective tax rate exceeded our blended statutory tax rate due to the effects of these factors.

The accounting for deferred taxes is based upon estimates of future results. Differences between estimated and actual results could result in changes in the valuation of our deferred tax assets that could have a material impact on our consolidated results of operations or financial position. Changes in existing tax laws could also affect actual tax results and the realization of deferred tax assets over time. During the six months ended June 30, 2015 and 2014, we recorded adjustments to our deferred tax assets resulting from changes in our prospective effective tax rate resulting from certain states enacting changes to tax laws along with other factors. The estimated impact of such changes was recorded to income tax expense during the respective periods.

We evaluate our deferred tax assets each period to determine if a valuation allowance is required based on whether it is "more likely than not" that some portion of the deferred tax assets would not be realized. The ultimate realization of these deferred tax assets is dependent upon the generation of sufficient taxable income during future periods. We conduct our evaluation by considering all available positive and negative evidence. This evaluation considers, among other factors, historical operating results, forecasts of future profitability, the duration of statutory carryforward periods, and the outlooks for the U.S. housing industry and broader economy.

Unrecognized tax benefits represent the difference between tax positions taken or expected to be taken in a tax return and the benefits recognized for financial statement purposes. At both June 30, 2015 and December 31, 2014, we had $32.9 million of gross unrecognized tax benefits and $17.3 million of related accrued interest and penalties. It is reasonably possible within the next twelve months that our gross unrecognized tax benefits may decrease by up to $14.7 million, excluding interest and penalties, primarily due to expirations of certain statutes of limitations and potential settlements.

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. The statutes of limitation for our major tax jurisdictions generally remain open for examination for tax years 2004 to 2015.