. as of december 31 , 2010 , we had no net operating loss carryforwards ( 201cnols 201d ) for federal income tax purposes and $ 13 million of nol benefit for state income tax purposes . the state nols begin to expire in the year 2020 . in addition , there are $ 11 million of tax benefits related to credit carryforwards which are partially offset by a valuation allowance and $ 42 million of capital loss carryforwards which were fully offset by a valuation allowance