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Bank Deposits (Tables)
 12 Months Ended
Dec. 31, 2021
Deposit Liabilities [Abstract]  
Deposits from Banking Clients Consisting of Interest Bearing and Noninterest Bearing Deposits
Bank deposits consist of interest-bearing and non-interest-bearing deposits as follows:
December 31,20212020
Interest-bearing deposits:  
Deposits swept from brokerage accounts$412,287 $332,513 
Checking22,786 17,785 
Savings and other7,234 6,739 
Total interest-bearing deposits442,307 357,037 
Non-interest-bearing deposits1,471 985 
Total bank deposits$443,778 $358,022