private void WriteCategoryDetailsSheet(GLRecapCategory cat)
        {
            var subTitle = cat.AccountType.ToString() + " Details";

            _xl.AddWorksheet(subTitle);
            WriteSheetHeader(subTitle);

            var startCol = 2;
            var acctSpan = 4;
            var dateSpan = 1;
            var txnSpan  = 8;
            var rowCount = cat.Sum(_ => _.Count);
            var nextCol  = startCol;

            WriteGLAccountsColumn(cat, ref nextCol, acctSpan);

            WriteDatesColumn(cat, ref nextCol, dateSpan);

            WriteTransctionDescCol(cat, txnSpan, ref nextCol);
            WriteTotalsRowLabel(nextCol - txnSpan, txnSpan);

            WriteDetailAmounts(cat, ref nextCol, "Debit", _ => _.AsDebit);
            SummarizeCurrentColumn(rowCount);

            WriteDetailAmounts(cat, ref nextCol, "Credit", _ => _.AsCredit);
            SummarizeCurrentColumn(rowCount);

            SetRowHeights(rowCount);
        }