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	Mar. 31, 2023	Dec. 31, 2022
Estimated Fair Value
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	$ 16,623,561	$ 11,114,100
Estimated Fair Value \| Loans held for investment \| Reverse mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	724,306	771,724
Estimated Fair Value \| Loans held for investment \| Commercial mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	12,662	136,274
Estimated Fair Value \| Loans held for sale \| Commercial mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	18,743	161,861
Estimated Fair Value \| Loans held for sale \| Residential mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	58,751	12,123
Estimated Fair Value \| HMBS related obligations
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	16,407,629	10,996,755
Estimated Fair Value \| Nonrecourse debt in consolidated VIE trusts
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	7,955,875	7,175,857
Estimated Fair Value \| Nonrecourse MSR financing liability
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	988	60,562
Estimated Fair Value \| Nonrecourse commercial loan financing liability
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	75,689	106,758
Estimated Fair Value \| Reverse mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value		9,356
Estimated Fair Value \| Reverse mortgage loans \| Loans held for investment, subject to nonrecourse debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	8,009,079	7,065,477
Estimated Fair Value \| Commercial mortgage loans \| Loans held for investment, subject to nonrecourse debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Estimated Fair Value	365,748	389,161
Unpaid Principal Balance
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	15,850,053	10,719,000
Unpaid Principal Balance \| Loans held for investment \| Reverse mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	685,924	724,800
Unpaid Principal Balance \| Loans held for investment \| Commercial mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	12,946	143,373
Unpaid Principal Balance \| Loans held for sale \| Commercial mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	19,747	173,112
Unpaid Principal Balance \| Loans held for sale \| Residential mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	67,794	15,529
Unpaid Principal Balance \| HMBS related obligations
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	15,850,053	10,719,000
Unpaid Principal Balance \| Nonrecourse debt in consolidated VIE trusts
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	8,139,139	7,819,992
Unpaid Principal Balance \| Nonrecourse MSR financing liability
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	988	60,562
Unpaid Principal Balance \| Nonrecourse commercial loan financing liability
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	74,604	105,291
Unpaid Principal Balance \| Reverse mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance		9,356
Unpaid Principal Balance \| Reverse mortgage loans \| Loans held for investment, subject to nonrecourse debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	7,974,381	7,240,125
Unpaid Principal Balance \| Commercial mortgage loans \| Loans held for investment, subject to nonrecourse debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	$ 373,052	$ 405,970