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Bank Deposits (Tables) | 9 Months Ended
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Sep. 30, 2018
Deposits Liabilities Balance Sheet Reported Amounts [Abstract] |
Schedule Of Deposits | Deposits consist of money market and savings accounts, certificates of deposit, and demand deposits. Deposits at September 30, 2018 and December 31, 2017 were as follows (in thousands):
|  | September 30, 2018 |  |  | December 31, 2017 |
Money market and savings accounts |  | $ | 11,950,269 |  |  | $ | 13,219,675 |
Certificates of deposit |  |  | 1,970,318 |  |  |  | 1,575 |
Demand deposits (interest-bearing) |  |  | 465,366 |  |  |  | 184,829 |
Demand deposits (non-interest-bearing) |  |  | 116,999 |  |  |  | 5,856 |
|  | $ | 14,502,952 |  |  | $ | 13,411,935 |
Schedule of Maturities of Certificates of Deposit | Scheduled maturities of certificates of deposit at September 30, 2018 and December 31, 2017 were as follows (in thousands):
|  | September 30, 2018 |  |  | December 31, 2017 |
Certificates of deposit, less than $100: |  |  |  |  |  |  |  |
Within one year |  | $ | 5,617 |  |  | $ | 438 |
One to three years |  |  | 544 |  |  |  | 148 |
Three to five years |  |  | 127 |  |  |  | — |
|  | $ | 6,288 |  |  | $ | 586 |
Certificates of deposit, $100 and greater: |  |  |  |  |  |  |  |
Within one year |  | $ | 1,740,855 |  |  | $ | 651 |
One to three years |  |  | 193,185 |  |  |  | 338 |
Three to five years |  |  | 29,990 |  |  |  | — |
|  |  | 1,964,030 |  |  |  | 989 |
|  | $ | 1,970,318 |  |  | $ | 1,575 |

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