Retiring Sen. Byron Dorgan (D-N.D.) indicated Thursday that he is not yet ready to vote for the renomination of Federal Reserve Chairman Ben Bernanke.

Dorgan said he would vote no on Bernanke's renomination unless the central bank released information on its direct loans to commercial banks during the financial collapse of 2008.

"That's unacceptable to me," Dorgan told reporters. "If he will not provide that information to the Congress and the American people I won't vote for his nomination."

Dorgan -- who has traditionally been skeptical of large banks -- previously penned a letter to Bernanke requesting the information, but said he was rebuffed. 

Observers expected the Senate to vote on Bernanke's renomination on Friday, but the vote has been pushed back to a later date. His term expires on Jan. 31.

Bernanke, who was first nominated by President George W. Bush in 2007, is expected to receive a second term.