Michael Jackson's mother and the singer's three children are being well taken care of, financially speaking, after the singer's death.

Court documents released Thursday in Los Angeles show that Katherine Jackson is receiving $86,804 per month from her son's estate to support herself and her three grandchildren. A judge approved the payments last month.

The documents state that Katherine, 79, had been financially dependent on her son during his life, and that for years, Michael had paid for all her living expenses at the Jackson family's Encino, Calif., home.

Lawyers for the singer's estate also estimated his total assets exceeds $500 million, and that future business agreements bearing Michael Jackson's name could generate "tens of millions of dollars."

Katherine Jackson has been named permanent guardian of the three grandchildren. All four are primary beneficiaries under the singer's will, including some unnamed charities.