Your income is taxed by Idaho:
http://tax.idaho.gov/answers_IIT.htm#5
IIT - 14
I am an Idaho resident and work in another state. Is my income taxable to Idaho?
If you are an Idaho resident, all of your income, including income from sources outside Idaho, is taxable. If some or all of your income is also taxed by another state, you may be entitled to a credit against your Idaho income tax. To take this credit, you must complete Form 40 and Form 39R and attach a complete copy of the other state’s tax return to your Idaho return.
If you are a part-year resident, you are taxed on all of the income you receive while living in Idaho plus any income you receive from Idaho sources when not living in Idaho. During the time that you were an Idaho resident, if some or all of the income was also taxed by another state, you may be entitled to a credit against your Idaho income tax. To take this credit, you must complete Form 43 and Form 39NR and attach a complete copy of the other state’s tax return to your Idaho return.
For information on residency status refer to the Residency Status Brochure.
Ref: Idaho Code Sections 63-3002, 63-3022, 63-3026A and 63-3029