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Bank Call Loans - Additional Information (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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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] + References No definition available. + Details
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- Definition Broker call rate as of the balance sheet date. + References No definition available. + Details
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- Definition Interest expense on bank call loans. + References No definition available. + Details
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Balance Type: | debit
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