Camden National Bank has signed an agreement to buy 15 Maine branches of Bank of America. The acquisitions will give Camden National Bank a total of 53 banking branches.

The transaction, expected to happen this fall, is subject to regulatory approval.

Greg Dufour, president and CEO, said Tuesday that Camden National Bank has yet to decide about the future of the estimated 75 employees who work at the 15 Bank of America locations. Camden National Bank has 425 employees.

“The plan … over the next couple of weeks is to start talking to employees, learn about them and about the business and analyze and figure out what is the right structure for those locations going forward,” Dufour said.

Dufour said the bank expects to transition customers over to Camden National, issuing new debit cards and new checks by the end of the third quarter, assuming approval by the Office of the Controller of the Currency and the Federal Reserve Bank of Boston.

Dufour characterized the transaction, in which Bank of America is divesting a portion of its franchise, as friendly.

The affected branches are in Auburn, Brewer, Gardiner, Lewiston, Newport, Old Town, Rockland and Waterville, as well as three each in the Augusta and Bangor markets. The bank is also acquiring the on-site ATMs, Dufour said. Camden National Bank will also reopen the Orono branch.

A statement from the bank said the transaction will produce the largest market share of deposits held by an independent community bank headquartered in Maine.

Bank of America officials didn’t say why the branches are being sold, but said in a statement that it was the right decision “so the community will continue to have access to a banking center, more employees will keep their jobs, and customers will have the ability to keep banking at the same branch that is most convenient for them.”

Charlotte, N.C.-based Bank of America said in September that it planned to lay off 30,000 employees in the coming years as it cut $5 billion in costs.