Telephone and Data Systems, Inc, parent company to TDS Telecom, announced Thursday an agreement to acquire substantially all of the assets of a group of companies operating as BendBroadband, headquartered in Bend for a purchase price of $261 million. BendBroadband generated annual revenues of $70 million in 2013 and has approximately 280 employees. The transaction is expected to close in the third quarter of 2014 pending regulatory approvals and other conditions.