Quarterly report pursuant to Section 13 or 15(d)

Indebtedness - Schedule of Debt (Details)

v3.21.1
Indebtedness - Schedule of Debt (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Plus: Debt premium $ 106,448 $ 108,778
Less: Debt discount (68,280) (55,624)
Total debt, net 5,274,225 4,796,145
Unused borrowing capacity 154,250  
Recourse Debt    
Debt Instrument [Line Items]    
Total debt, gross 580,196 230,660
Unused borrowing capacity 32,500  
Recourse Debt | Bank Line Of Credit    
Debt Instrument [Line Items]    
Total debt, gross 180,196 $ 230,660
Unused borrowing capacity $ 32,500  
Weighted average interest rate 3.36% 3.53%
Recourse Debt | 0% Convertible Senior Notes    
Debt Instrument [Line Items]    
Total debt, gross $ 400,000 $ 0
Unused borrowing capacity $ 0  
Weighted average interest rate 0.00%  
Interest rate during period 0.00%  
Non Recourse Debt    
Debt Instrument [Line Items]    
Total debt, gross $ 4,655,861 4,512,331
Unused borrowing capacity 121,750  
Non Recourse Debt | Senior revolving and delayed draw loans    
Debt Instrument [Line Items]    
Total debt, gross 731,300 $ 587,600
Unused borrowing capacity $ 97,050  
Weighted average interest rate 2.78% 2.85%
Non Recourse Debt | Senior Non Revolving Loans    
Debt Instrument [Line Items]    
Total debt, gross $ 879,583 $ 1,087,386
Unused borrowing capacity $ 0  
Weighted average interest rate 3.85% 3.68%
Non Recourse Debt | Senior Non Revolving Loans | Minimum    
Debt Instrument [Line Items]    
Interest rate during period 4.50%  
Non Recourse Debt | Senior Non Revolving Loans | Maximum    
Debt Instrument [Line Items]    
Interest rate during period 6.50%  
Non Recourse Debt | Subordinated revolving and delayed draw loans    
Debt Instrument [Line Items]    
Total debt, gross $ 139,053 $ 282,722
Unused borrowing capacity $ 24,700  
Weighted average interest rate 9.11% 8.43%
Non Recourse Debt | Subordinated revolving and delayed draw loans | Minimum    
Debt Instrument [Line Items]    
Interest rate during period 8.50%  
Non Recourse Debt | Subordinated revolving and delayed draw loans | Maximum    
Debt Instrument [Line Items]    
Interest rate during period 10.00%  
Non Recourse Debt | Subordinated Loans    
Debt Instrument [Line Items]    
Total debt, gross $ 836,882 $ 668,642
Total debt, net 124,100  
Unused borrowing capacity $ 0  
Weighted average interest rate 8.64% 8.76%
Non Recourse Debt | Subordinated Loans | Minimum    
Debt Instrument [Line Items]    
Interest rate during period 8.00%  
Non Recourse Debt | Subordinated Loans | Maximum    
Debt Instrument [Line Items]    
Interest rate during period 10.00%  
Non Recourse Debt | Securitized Loans    
Debt Instrument [Line Items]    
Total debt, gross $ 2,069,043 $ 1,885,981
Unused borrowing capacity $ 0  
Weighted average interest rate 3.90% 4.18%
Non Recourse Debt | Securitized Loans | Minimum    
Debt Instrument [Line Items]    
Interest rate during period 2.33%  
Non Recourse Debt | Securitized Loans | Maximum    
Debt Instrument [Line Items]    
Interest rate during period 5.31%  
Recourse and Nonrecourse Debt    
Debt Instrument [Line Items]    
Total debt, gross $ 5,236,057 $ 4,742,991
Unused borrowing capacity $ 154,250  
LIBOR | Recourse Debt | Bank Line Of Credit    
Debt Instrument [Line Items]    
Interest rate during period 3.25%  
LIBOR | Non Recourse Debt | Senior revolving and delayed draw loans | Minimum    
Debt Instrument [Line Items]    
Interest rate during period 2.50%  
LIBOR | Non Recourse Debt | Senior revolving and delayed draw loans | Maximum    
Debt Instrument [Line Items]    
Interest rate during period 3.25%  
LIBOR | Non Recourse Debt | Senior Non Revolving Loans | Minimum    
Debt Instrument [Line Items]    
Interest rate during period 2.125%  
LIBOR | Non Recourse Debt | Senior Non Revolving Loans | Maximum    
Debt Instrument [Line Items]    
Interest rate during period 2.25%  
LIBOR | Non Recourse Debt | Subordinated revolving and delayed draw loans    
Debt Instrument [Line Items]    
Interest rate during period 9.00%  
LIBOR | Non Recourse Debt | Subordinated Loans | Minimum    
Debt Instrument [Line Items]    
Interest rate during period 5.00%  
LIBOR | Non Recourse Debt | Subordinated Loans | Maximum    
Debt Instrument [Line Items]    
Interest rate during period 6.75%