as of december 31 , 2011 and 2010 , other borrowings also included $ 2.3 million and $ 19.3 million , respectively , of collateral pledged to the bank by its derivatives counterparties to reduce credit exposure to changes in market value . as of december 31 , 2010 , other borrowings also included $ 0.5 million of overnight and other short-term borrowings in connection with the federal reserve bank 2019s treasury , tax and loan programs . the company pledged $ 0