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Bank Call Loans - Summary of Bank Call Loans (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Bank Call Loans [Abstract] |  |
Year-end balance | $ 15,000 | $ 118,300
Weighted interest rate (at end of year) | 3.43% | 2.25%
Maximum balance (at any month-end) | $ 161,800 | $ 230,400
Bank Call Loans Average Amount Outstanding | $ 53,271 | $ 123,918
Average interest rate (during the year) | 2.66% | 2.08%

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- Definition Bank Call Loans Average Amount Outstanding + References No definition available. + Details
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- Definition Bank loans maximum balance at any month end. + References No definition available. + Details
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- Definition Amounts due on short-term bank loans secured by customers' securities on the balance sheet date. + References No definition available. + Details
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