Derivative Instruments - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net premiums received on derivative instrument assets		$ 0.5
Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount, additions		$ 1,300.0
Derivative, average fixed interest rate during period		1.36%
Interest Rate Swap, ARM Portfolio
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, average fixed interest rate during period	3.08%	0.62%
Derivative, notional amount, terminated	$ 100.0	$ 5,500.0
Minimum | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, term of contract		18 months
Maximum | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, term of contract		3 years