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Summary of Significant Accounting Policies - Securities Borrowed and Securities Loaned (Details)	3 Months Ended
	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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- Definition

Represents the minimum initial collateral advanced or received expressed as a percentage of fair value of the underlying securities borrowed or loaned.

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No definition available.

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