Idaho Code § 31-2220

If the sheriff, on being arrested by a coroner, or if the sheriff or coroner on being arrested by an elisor, or if another person in an action in which both the sheriff and coroner are plaintiffs upon an order of arrest in a civil action, neglect to give bail or make a deposit of money instead thereof, or if the sheriff be arrested on execution against his body, or on a warrant of attachment, he or they must be confined in a house other than that of the sheriff, or the county jail, in the same manner as the sheriff is required to confine a prisoner in the county jail. The house in which he is thus confined thereupon becomes for that purpose the county jail.