According to the database, Post Falls PD is moving to ICAWIN 700 MHz and the Post Falls Police are all encrypted (DE), so no scanner will monitor them. Also the county SO has a lot of encrypted listed. It is unlikely you will hear much of anything other than Fire and EMS. For Fire and EMS you would need a Phase 1 P25 trunking scanner.
Scanner Frequencies and Radio Frequency Reference for Kootenai County, Idaho (ID)
www.radioreference.com
Idaho Cooperative Agencies Wireless Interoperable Network (ICAWIN) Trunking System Profile
www.radioreference.com
EDIT - Sorry
@K9KLC typing as you posted.