| Reverse Repurchase Agreements | 6 Months Ended | 
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| Jun. 30, 2021 | |
| Reverse Repurchase Agreements [Abstract] | |
| Reverse Repurchase Agreements | Reverse Repurchase AgreementsAs of June 30, 2021 and December 31, 2020, the Company had $66.9 million and $89.5 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 $70.0 million and $91.5 million, respectively. | 
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- Definition Reverse Repurchase Agreements [Abstract] No definition available. 
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- Definition The entire disclosure for resale agreements (also known as reverse repurchase agreements or reverse repos). No definition available. 
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