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v3.19.1

Summary of Significant Accounting Policies - Securities Borrowed and Securities Loaned (Details) | 3 Months Ended
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Mar. 31, 2019
Accounting Policies [Abstract] |
Minimum initial collateral advanced or received expressed as a percentage of fair value of the underlying securities borrowed or loaned | 102.00%

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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- Definition Represents the minimum initial collateral advanced or received expressed as a percentage of fair value of the underlying securities borrowed or loaned. + References No definition available. + Details
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Period Type: | duration