Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_22779004_1 ( conference VARCHAR, regular_season_winner VARCHAR )

### Question ###
Who won the tournament when Idaho State won the regular season?

### Accurate SQL ###

SELECT conference AS Tournament FROM table_22779004_1 WHERE regular_season_winner = "Idaho State"