Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.21.2
Subsequent Events - Additional Information (Detail) - USD ($)
$ in Thousands
Oct. 31, 2021
May 14, 2021
Sep. 30, 2021
Subsequent Event [Line Items]      
Line of credit facility, Maximum borrowing capacity     $ 6,312,334
October Two Thousand and Twenty One Credit Facility One [Member]      
Subsequent Event [Line Items]      
Line of credit facility, Maximum borrowing capacity     200,000
October Two Thousand and Twenty One Credit Facility Two [Member]      
Subsequent Event [Line Items]      
Line of credit facility, Maximum borrowing capacity     250,000
November Two Thousand and Twenty Three Credit Facility [Member]      
Subsequent Event [Line Items]      
Line of credit facility, Maximum borrowing capacity     $ 65,000
Parkside Lending, LLC [Member]      
Subsequent Event [Line Items]      
Payments to acquire business   $ 20,000  
Business Combination, Consideration Transferred, Liabilities Incurred   7,000  
Business Combination, Consideration Transferred   $ 27,000  
Subsequent Event [Member] | October Two Thousand and Twenty One Credit Facility One [Member]      
Subsequent Event [Line Items]      
Line of credit amended expiration month year 2022-10    
Subsequent Event [Member] | October Two Thousand and Twenty One Credit Facility Two [Member]      
Subsequent Event [Line Items]      
Line of credit amended expiration month year 2022-10    
Subsequent Event [Member] | November Two Thousand and Twenty Three Credit Facility [Member]      
Subsequent Event [Line Items]      
Line of credit facility, Maximum borrowing capacity $ 100,000