Arthur, N.D. (July 20, 2018) – First State Bank of North Dakota, Arthur, N.D., has changed its name to BankNorth. First Financial Corp., the holding company of what is now BankNorth, announced the name change today. BankNorth President James L. Williams III said the name change was necessary because of the acquisition of First State Bank of Warner (S.D.), which has locations in Warner and Aberdeen. “For the first time in our nearly 115 years we’re expanding beyond the borders…