The reconciliation of the net incurred and paid claims development tables to the reserves for losses and loss expenses in the consolidated balance sheet is as follows: (In thousands) December 31, 2020 Undiscounted reserves for loss and loss expenses, net of reinsurance: Other liability $ 4,436,965  Workers' compensation 1,843,751  Professional liability 1,203,104  Commercial automobile 835,375  Short-tail lines 631,217  Other 96,257  Insurance 9,046,669  Casualty 1,644,886  Monoline excess 1,233,027  Property 179,278  Reinsurance & Monoline Excess 3,057,191  Total undiscounted reserves for loss and loss expenses, net of reinsurance $ 12,103,860  (In thousands) December 31, 2020 Due from reinsurers on unpaid claims: Other liability $ 609,006  Workers' compensation 267,707  Professional liability 644,841  Commercial automobile 32,140  Short-tail lines 352,168  Other 36,070  Insurance 1,941,932  Casualty 104,372  Monoline excess 41,598  Property 76,135  Reinsurance & Monoline Excess 222,105  Total due from reinsurers on unpaid claims $ 2,164,037  89