Idaho Code § 31-414

Promptly after such consolidation becomes effective, all records, files, proceedings, instruments, documents, bonds, reports, maps, plats, rolls and the like shall be delivered to and taken possession of by the appropriate officer of the county with which the consolidation has been made, and the same shall become a part of the official files and records of such office. All property of the formerly existing county shall become the property of the consolidated county and shall be managed, handled and disposed of as other county property. Any real property and equipment such as court house, jail or hospital, no longer required, may be sold as like county property is sold.