Finance of America Companies Inc. Quarterly report pursuant to Section 13 or 15(d)

Fair Value - Summary of Fair Value and Unpaid Principal Balance ("UPB") of Financial Assets and Liabilities With Elected Fair Value Option (Details)

Fair Value - Summary of Fair Value and Unpaid Principal Balance ("UPB") of Financial Assets and Liabilities With Elected Fair Value Option (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Nonrecourse commercial loan financing liability
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	$ 10,916,551	$ 10,556,054
Nonrecourse commercial loan financing liability \| Loans held for investment \| Reverse mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	1,126,483	940,604
Nonrecourse commercial loan financing liability \| Loans held for investment \| Commercial mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	180,930	90,724
Nonrecourse commercial loan financing liability \| Loans held for sale \| Commercial mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	229,773	149,426
Nonrecourse commercial loan financing liability \| Loans held for sale \| Residential mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	629,877	1,902,952
Nonrecourse commercial loan financing liability \| HMBS related obligations
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	10,784,841	10,422,358
Nonrecourse commercial loan financing liability \| Nonrecourse debt in consolidated VIE trusts
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	6,525,382	5,857,069
Nonrecourse commercial loan financing liability \| Nonrecourse MSR financing liability
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	59,800	142,435
Nonrecourse commercial loan financing liability \| Nonrecourse commercial loan financing liability
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	160,344	111,738
Nonrecourse commercial loan financing liability \| Reverse mortgage loans \| Loans held for investment, subject to nonrecourse debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	6,285,773	5,823,301
Nonrecourse commercial loan financing liability \| Commercial mortgage loans \| Loans held for investment, subject to nonrecourse debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	455,618	394,893
Unpaid Principal Balance
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	10,609,500	9,849,835
Unpaid Principal Balance \| Loans held for investment \| Reverse mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	1,078,048	815,426
Unpaid Principal Balance \| Loans held for investment \| Commercial mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	181,001	89,267
Unpaid Principal Balance \| Loans held for sale \| Commercial mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	235,789	145,463
Unpaid Principal Balance \| Loans held for sale \| Residential mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	648,123	1,859,788
Unpaid Principal Balance \| HMBS related obligations
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	10,587,475	9,849,835
Unpaid Principal Balance \| Nonrecourse debt in consolidated VIE trusts
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	7,114,952	5,709,946
Unpaid Principal Balance \| Nonrecourse MSR financing liability
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	59,800	142,435
Unpaid Principal Balance \| Nonrecourse commercial loan financing liability
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	153,770	107,744
Unpaid Principal Balance \| Reverse mortgage loans \| Loans held for investment, subject to nonrecourse debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	6,501,202	5,165,479
Unpaid Principal Balance \| Commercial mortgage loans \| Loans held for investment, subject to nonrecourse debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	$ 457,525	$ 388,788