Idaho constitution
Article V
Section 11

The state shall be divided into five (5) judicial districts, for each of which a judge shall be chosen by the qualified electors thereof, whose term of office shall be four (4) years. And there shall be held a district court in each county, at least twice in each year, to continue for such time in each county as may be prescribed by law. But the legislature may reduce or increase the number of districts, district judges and district attorneys. This section shall not be construed to prevent the holding of special terms under such regulations as may be provided by law.