Idaho Code § 19-514
If the offense charged is a felony, the officer making the arrest must cause the defendant to be taken before the magistrate who issued the warrant, or in the case of his absence or inability to act, before the nearest or most accessible magistrate in the same county, and must at the same time deliver to the magistrate the warrant, with his return thereon endorsed and subscribed by him, but all hearings on preliminary examinations must, as far as possible, be had before the magistrate most convenient to the majority of the witnesses for the prosecution, unless for good cause it is ordered to be held elsewhere, and in all such cases the preliminary examinations must be had as hereinafter provided, unless such person shall waive his right to such examination.
If the offense charged is a misdemeanor, and the defendant is arrested in another county, the officer must, upon the request of the defendant, take him before a magistrate in that county, who may admit him to bail in an amount which, in his judgment, will be reasonable and sufficient for the appearance of the defendant, and said magistrate must direct the defendant to appear before the court or magistrate by whom the warrant was issued on or before a day certain which shall in no case be more than fourteen (14) days after such admittance to bail. If bail shall be forthwith given, the magistrate shall take the same and endorse thereon a memorandum of the aforesaid order for the appearance of the defendant. On taking of said bail, the magistrate must certify that fact on the warrant, and deliver the warrant and undertaking of bail to the officer in charge of the defendant. The officer must then discharge the defendant from arrest, and must without delay, deliver the warrant and undertaking to the court at which the defendant is required to appear.
If bail is not forthwith given by the defendant, the officer must cause the defendant to be taken before the magistrate who issued the warrant, or in case of his absence or inability to act before the nearest and most accessible magistrate in the same county, and at the same time deliver to the magistrate the warrant with his return endorsed thereon.
Idaho Code § 19-514