BCA Joins Bank BNI and Bank Mandiri to Back BUMA's Diversification Strategy with USD250 Million Equivalent Facility PT Bukit Makmur Mandiri Utama (BUMA), the principal subsidiary of PT Delta Dunia Makmur Tbk (Delta Dunia Group, IDX: DOID), secured a USD250 million equivalent Accordion Facility from PT Bank Central Asia Tbk (BCA).