. charge-offs have been taken where the fair value less costs to sell the collateral was less than the recorded investment of the loan and were $ 128.1 million . of these nonperforming loans , approximately 78% ( 78 % ) were current on their payments at december 31 , 2012 . ( b ) accruing loans have demonstrated a period of at least six months of performance under the restructured terms and are excluded from nonperforming loans