Quarterly report pursuant to Section 13 or 15(d)

Condensed Financial Information of Registrant (Parent Company Only) - Additional information (Detail)

v3.21.2
Condensed Financial Information of Registrant (Parent Company Only) - Additional information (Detail) - Parent Company [Member] - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Jun. 30, 2020
Condensed Financial Statements, Captions [Line Items]        
Dividends $ 0 $ 75,000,000.0 $ 0 $ 0
FOA        
Condensed Financial Statements, Captions [Line Items]        
Cash $ 0      
Percentage of restricted net assets to consolidated net assets 25.00%