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Bank Deposits (Scheduled Maturities of Certificates of Deposit) (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
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Deposits Liabilities Balance Sheet Reported Amounts [Abstract] |  |
Within one year | $ 3,120 | $ 5,305
One to three years | 244 | 360
Three to five years | 13 | 13
Certificates of deposit, less than $100,000 | 3,377 | 5,678
Within one year | 74,158 | 441,341
One to three years | 34,163 | 68,855
Three to five years | 200 | 7,084
Certificates of deposit, $100,000 and greater | 108,521 | 517,280
Total certificates of deposit | $ 111,898 | $ 522,958

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