Reverse Repurchase Agreements	3 Months Ended
	Mar. 31, 2023
Reverse Repurchase Agreements [Abstract]
Reverse Repurchase Agreements	Reverse Repurchase AgreementsAs of March 31, 2023 and December 31, 2022, the Company had $247.2 million and $189.5 million in amounts due to counterparties as collateral for reverse repurchase agreements that could be pledged, delivered or otherwise used, with a fair value of $288.6 million and $189.3 million, respectively. Additionally, as of March 31, 2023 and December 31, 2022, the Company had entered into $195.3 million and $877.6 million in reverse repurchase agreements in order to effectively borrow U.S. Treasury securities and pledge them as collateral for $200.8 million and $888.3 million, respectively, of repurchase agreements (see Note 11 - Repurchase Agreements for further detail). These reverse repurchase agreements had the same maturities as the corresponding repurchase agreements, which were all short term as of both March 31, 2023 and December 31, 2022.