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Bank Call Loans - Additional Information (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Bank Call Loans [Abstract]
Broker call rate	2.00%	3.50%
Interest expense on bank call loans	$ 0.8	$ 0.4	$ 1.4

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- Definition

Bank Call Loans [Abstract]

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No definition available.

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- Definition

Broker call rate as of the balance sheet date.

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No definition available.

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- Definition

Interest expense on bank call loans.

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No definition available.

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