Rayonier Advanced Materials completed an $870 million cash and stock acquisition of Tembec Inc., which is based in Canada. The acquisition between the "complementary" businesses was announced in May. Tembec employs about 3,000 people in the Canadian provinces of Quebec and Ontario as well as some operations in France. The combined company will maintain its global headquarters in Jacksonville, Florida, while maintaining its Canadian headquarters in Montreal. “This acquisition advances our strategic…