Busma also had nine rebounds and five blocks for the Bengals (4-7).
Idaho State led by four at halftime and never trailed in the second half. Troy got within 67-64 with 3:50 to play after Patterson and Regis Huddleston hit consecutive 3-point shots, but that was as close as the Trojans could get as Mike Lacey and Abner Moreira hit free throws down the stretch for the Bengals.
Troy shot 50 3-point shots, making only 11. Idaho State, meanwhile, shot 61 percent from the field in the second half, including 4 of 6 from behind the 3-point line.