| Reverse Repurchase Agreements | 3 Months Ended | 
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| Mar. 31, 2020 | |
| Reverse Repurchase Agreements [Abstract] | |
| Reverse Repurchase Agreements | Reverse Repurchase Agreements 
As of March 31, 2020 and December 31, 2019, the Company had $145.6 million and $215.6 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 $147.7 million and $220.0 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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