December 17 (SeeNews) - Fitch Ratings said on Friday it downgraded Slovenia's Abanka Vipa's [LJE:ABKN] Long-term Issuer Default Rating to 'BBB-' from 'BBB' and Gorenjska Banka's Long-term IDR to 'BBB' from 'BBB+' to reflect the deterioration in asset quality at the banks.