Other Assets - TBA Securities (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Derivative [Line Items]
Notional Amount	$ 3,200,000,000		$ 3,200,000,000
TBA Securities | Short
Derivative [Line Items]
Aggregate value					$ (1,300,000)
Gain on derivative	$ 20,300,000	$ 1,100,000	$ 39,200,000	$ 1,100,000
FNCL 2.5 | Short
Derivative [Line Items]
Notional Amount					180,000,000
FNCL 2 | Short
Derivative [Line Items]
Notional Amount					$ 130,000,000