Financings - Repurchase Agreements Remaining Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Certain characteristics of the Company's repurchase agreements
Repurchase Agreement Borrowings	$ 617,189	$ 358,846
1 to 29 days
Certain characteristics of the Company's repurchase agreements
Repurchase Agreement Borrowings	53,081	59,856
30 to 59 days
Certain characteristics of the Company's repurchase agreements
Repurchase Agreement Borrowings	370	13,421
60 to 89 days
Certain characteristics of the Company's repurchase agreements
Repurchase Agreement Borrowings	606	35,321
Greater than or equal to 90 days
Certain characteristics of the Company's repurchase agreements
Repurchase Agreement Borrowings	$ 563,132	$ 250,248