Arnold & Porter added Christopher J. Renk and Michael Harris as partners and Helen Hill Minsker as senior counsel. All three intellectual-property lawyers were previously with Banner & Witcoff Ltd.• Swanson, Martin & Bell LLP partner Brenda J. Robinson has been named president of the board of directors of the International Documentary Association.Robinson, who joined the board in 2018, is the organization’s first Black president. Founded in 1982, IDA serves documentary filmmakers through funding …