Idaho Code § 19-4015

Whenever articles of impeachment against any officer subject to impeachment are presented to the senate, such officer is temporarily suspended from his office, and cannot act in his official capacity until he is acquitted. Upon such suspension of any state officer, his office must at once be temporarily filled by an appointment made by the governor, with the advice and consent of the senate, until the acquittal of the party impeached; or, in case of his removal, until the vacancy is filled as required by law.