Annual report pursuant to Section 13 and 15(d)

Other Assets, Net - Summary of Other Assets, Net (Parenthetical) (Detail)

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Other Assets, Net - Summary of Other Assets, Net (Parenthetical) (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Other Assets [Abstract]    
Receivables, net of allowance $ 266 $ 788
Servicer advances, net of allowance $ 2,115 $ 1,661