Income Taxes Income Tax Policies (Policies)

3 Months Ended

Mar. 31, 2013

Income Tax Disclosure [Abstract]

Income Tax, Policy [Policy Text Block]

We recognize deferred tax assets and liabilities for future tax consequences arising from differences between the carrying amounts of existing assets and liabilities under GAAP and their respective tax bases, and for net operating loss carryforwards and tax credit carryforwards. We evaluate the recoverability of our deferred tax assets, weighing all positive and negative evidence, and are required to establish or maintain a valuation allowance for these assets if we determine that it is more likely than not that some or all of the deferred tax assets will not be realized.