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Bank Deposits (Tables) | 12 Months Ended
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Dec. 31, 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 December 31, 2018 and 2017 were as follows (in thousands):
|  | December 31, |
|  | 2018 |  |  | 2017 |
Money market and savings accounts |  | $ | 13,609,612 |  |  | $ | 13,219,675 |
Certificates of deposit |  |  | 1,763,336 |  |  |  | 1,575 |
Demand deposits (interest-bearing) |  |  | 392,765 |  |  |  | 184,829 |
Demand deposits (non-interest-bearing) |  |  | 97,900 |  |  |  | 5,856 |
|  | $ | 15,863,613 |  |  | $ | 13,411,935 |
Schedule of Maturities of Certificates of Deposit | Scheduled maturities of certificates of deposit at December 31, 2018 and 2017 were as follows (in thousands):
|  | December 31, |
|  | 2018 |  |  | 2017 |
Certificates of deposit, less than $100,000: |  |  |  |  |  |  |  |
Within one year |  | $ | 27,440 |  |  | $ | 438 |
One to three years |  |  | 38,550 |  |  |  | 148 |
Three to five years |  |  | 15,511 |  |  |  | — |
|  | $ | 81,501 |  |  | $ | 586 |
Certificates of deposit, $100,000 and greater: |  |  |  |  |  |  |  |
Within one year |  | $ | 1,513,202 |  |  | $ | 651 |
One to three years |  |  | 157,232 |  |  |  | 338 |
Three to five years |  |  | 11,401 |  |  |  | — |
|  |  | 1,681,835 |  |  |  | 989 |
|  | $ | 1,763,336 |  |  | $ | 1,575 |

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