0001108134 2021-09-09 2021-09-09 false 0001108134 8-K 2021-09-09 BERKSHIRE HILLS BANCORP, INC. DE 001-15781 04-3510455 60 State Street Boston MA 02109 800 773-5601 false false false false Common stock, par value $0.01 per share BHLB NYSE false