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Insurance Operations - Summary of Combined Net Income for UPCIC and APPCIC (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Insurance [Abstract]        
Combined net income (loss) $ (22,903) $ (41,436) $ (21,723) $ (37,034)