the summary of future maturities of our outstanding long-term debt as of december 31 , 2010 is included in the commitments table in note 14 . 10 . income taxes and accounting for uncertainty in income taxes income taxes our income tax policy is to record the estimated future tax effects of temporary differences between the tax bases of assets and liabilities and amounts reported on our consolidated balance sheets , as well as probable operating loss , tax credit and other carryforwards