Masking double removes decimal point in back end

I am using https://editor.datatables.net/plug-ins/field-type/editor.mask to force a '$' character and numbers only in my field with an editor popup (MVC Core). It always returns **without **a decimal point even though the field is a double and the UI is showing a decimal point. I'm not sure is this an issue with datatables, or the jQueryMask plugin.

I have tried both of the following masks

                 {
                    label: "Tax:",
                    name: "taxAmount",
                    type: "mask",
                    mask: "$99999999999.00"
                },
                    {
                    label: "Total:",
                    name: "totalAmount",
                    type: "mask",
                    mask: "$#,##0.00",
                    maskOptions: {
                        reverse: true
                    }
        },