Annual report pursuant to Section 13 and 15(d)

Other Financing Lines of Credit - Additional Information (Detail)

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Other Financing Lines of Credit - Additional Information (Detail)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Line of Credit [Member]    
Debt outstanding, Weighted average interest rate 2.75% 3.15%
Debt Instrument, Covenant Description The Company’s borrowing arrangements and credit facilities contain various financial covenants which primarily relate to required tangible net worth amounts, liquidity reserves, leverage requirements, and profitability requirements.  
Debt Instrument, Covenant Compliance The terms of the Company’s financing arrangements and credit facilities contain covenants, and the terms of the Company’s GSE/seller servicer contracts contain requirements that may restrict the Company and its subsidiaries from paying distributions to its members. These restrictions include restrictions on paying distributions whenever the payment of such distributions would cause FoA to no longer be in compliance with any of its financial covenants or GSE requirements. Further, the Company is generally prohibited under Delaware law from making a distribution to a member to the extent that, at the time of the distribution, after giving effect to the distribution, liabilities of the Company (with certain exceptions) exceed the fair value of its assets. Subsidiaries of the Company are generally subject to similar legal limitations on their ability to make distributions to FoA.  
Mortagage Facilities [Member] | Maximum [Member]    
Advacnes provided threshold limit 100.00%  
Advance provided under various facilities percentage 100.00%  
Mortagage Facilities [Member] | Minimum [Member]    
Advance provided under various facilities percentage 94.00%  
Reverse Mortgage Facilities [Member] | Maximum [Member]    
Advacnes provided threshold limit 100.00%  
Advance provided under various facilities percentage 104.00%  
Reverse Mortgage Facilities [Member] | Minimum [Member]    
Advance provided under various facilities percentage 90.00%  
Commerical Loan facilities [Member] | Maximum [Member]    
Advacnes provided threshold limit 100.00%  
Advance provided under various facilities percentage 85.00%  
Commerical Loan facilities [Member] | Minimum [Member]    
Advance provided under various facilities percentage 70.00%