CREATE TABLE table_73439 ("Conference" TEXT, "Regular Season Winner" TEXT, "Conference Player of the Year" TEXT, "Conference Tournament" TEXT, "Tournament Venue  ( City ) " TEXT, "Tournament Winner" TEXT)

Who won the tournament when Idaho State won the regular season?
SELECT "Conference Tournament" FROM table_73439 WHERE "Regular Season Winner" = 'Idaho State'
SELECT "Conference Tournament" FROM "table_73439" WHERE "Regular Season Winner" = 'Idaho State'