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

Quarterly report pursuant to Section 13 or 15(d)

Fair Value - Summary of the fair value and unpaid principal balance ("UPB") (Detail)

Fair Value - Summary of the fair value and unpaid principal balance ("UPB") (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Estimated Fair Value
Fair Value Summary Of The Fair Value And Unpaid Principal Balance Upb [Line Items]
Estimated Fair Value	$ 10,882,441	$ 10,556,054
Unpaid Principal Balance	10,468,472	9,849,835
Mortgage Loans Held For Investment Subject To Nonrecourse Debt [Member] \| Estimated Fair Value \| Reverse Mortgage Loans [Member]
Fair Value Summary Of The Fair Value And Unpaid Principal Balance Upb [Line Items]
Estimated Fair Value	6,149,706	5,823,301
Unpaid Principal Balance	6,053,167	5,165,479
Mortgage Loans Held For Investment Subject To Nonrecourse Debt [Member] \| Estimated Fair Value \| Commercial Mortgage Loans [Member]
Fair Value Summary Of The Fair Value And Unpaid Principal Balance Upb [Line Items]
Estimated Fair Value	451,056	394,893
Mortgage Loans Held For Investment Subject To Nonrecourse Debt [Member] \| Unpaid Principal Balance \| Commercial Mortgage Loans [Member]
Fair Value Summary Of The Fair Value And Unpaid Principal Balance Upb [Line Items]
Unpaid Principal Balance	451,981	388,788
Mortgage Loans Held For Investment [Member] \| Estimated Fair Value \| Reverse Mortgage Loans [Member]
Fair Value Summary Of The Fair Value And Unpaid Principal Balance Upb [Line Items]
Estimated Fair Value	949,551	940,604
Unpaid Principal Balance	871,671	815,426
Mortgage Loans Held For Investment [Member] \| Estimated Fair Value \| Commercial Mortgage Loans [Member]
Fair Value Summary Of The Fair Value And Unpaid Principal Balance Upb [Line Items]
Estimated Fair Value	108,859	90,724
Mortgage Loans Held For Investment [Member] \| Unpaid Principal Balance \| Commercial Mortgage Loans [Member]
Fair Value Summary Of The Fair Value And Unpaid Principal Balance Upb [Line Items]
Unpaid Principal Balance	108,322	89,267
Mortgage Loans Held For Sale [Member] \| Estimated Fair Value \| Commercial Mortgage Loans [Member]
Fair Value Summary Of The Fair Value And Unpaid Principal Balance Upb [Line Items]
Estimated Fair Value	233,249	149,426
Mortgage Loans Held For Sale [Member] \| Estimated Fair Value \| Residential Mortgage Loans [Member]
Fair Value Summary Of The Fair Value And Unpaid Principal Balance Upb [Line Items]
Estimated Fair Value	996,345	1,902,952
Mortgage Loans Held For Sale [Member] \| Unpaid Principal Balance \| Commercial Mortgage Loans [Member]
Fair Value Summary Of The Fair Value And Unpaid Principal Balance Upb [Line Items]
Unpaid Principal Balance	239,108	145,463
Mortgage Loans Held For Sale [Member] \| Unpaid Principal Balance \| Residential Mortgage Loans [Member]
Fair Value Summary Of The Fair Value And Unpaid Principal Balance Upb [Line Items]
Unpaid Principal Balance	988,361	1,859,788
HMBS Related Obligations [Member] \| Estimated Fair Value
Fair Value Summary Of The Fair Value And Unpaid Principal Balance Upb [Line Items]
Estimated Fair Value	10,745,879	10,422,358
HMBS Related Obligations [Member] \| Unpaid Principal Balance
Fair Value Summary Of The Fair Value And Unpaid Principal Balance Upb [Line Items]
Unpaid Principal Balance	10,445,730	9,849,835
Non Recourse Debt [Member] \| Estimated Fair Value
Fair Value Summary Of The Fair Value And Unpaid Principal Balance Upb [Line Items]
Estimated Fair Value	6,447,238	5,857,069
Non Recourse Debt [Member] \| Unpaid Principal Balance
Fair Value Summary Of The Fair Value And Unpaid Principal Balance Upb [Line Items]
Unpaid Principal Balance	6,773,313	5,709,946
Nonrecourse Commercial Loan [Member] \| Unpaid Principal Balance
Fair Value Summary Of The Fair Value And Unpaid Principal Balance Upb [Line Items]
Estimated Fair Value	162,464	111,738
Unpaid Principal Balance	158,659	107,744
Nonrecourse Mortgage Service Rights [Member] \| Unpaid Principal Balance
Fair Value Summary Of The Fair Value And Unpaid Principal Balance Upb [Line Items]
Estimated Fair Value	142,382	142,435
Unpaid Principal Balance	$ 142,382	$ 142,435