leave the institution for rate-related or other reasons. Deposits can be adversely affected if economic conditions weaken in California, and the Company’s market area in particular. Potentially, the most volatile deposits in a financial institution are jumbo certificates of deposit, meaning time deposits with balances that equal or exceed $250,000, as clients with balances of that magnitude are typically more rate-sensitive than clients with smaller balances.
The following table summarizes the distribution of deposits and the percentage of distribution in each category of deposits at the dates indicated:
| | | | | | | | | | | | | | | | |
| | September 30, 2024 | | September 30, 2023 | | December 31, 2023 | |
| | Balance | | % to Total | | Balance | | % to Total | | Balance | | % to Total | |
|
| | (Dollars in thousands) | |
Demand, noninterest-bearing | | $ | 1,272,139 | | 27 | % | $ | 1,243,501 | | 27 | % | $ | 1,292,486 | | 30 | % |
Demand, interest-bearing | | | 913,910 | | 19 | % | | 1,004,185 | | 22 | % | | 914,066 | | 21 | % |
Savings and money market | | | 1,309,676 | | 28 | % | | 1,110,640 | | 24 | % | | 1,087,518 | | 25 | % |
Time deposits — under $250 | | | 39,060 | | 1 | % | | 43,906 | | 1 | % | | 38,055 | | 1 | % |
Time deposits — $250 and over | | | 196,945 | | 4 | % | | 252,001 | | 6 | % | | 192,228 | | 4 | % |
ICS/CDARS — interest-bearing demand, | | | | | | | | | | | | | | | | |
money market and time deposits | | | 997,803 | | 21 | % | | 921,224 | | 20 | % | | 854,105 | | 19 | % |
Total deposits | | $ | 4,729,533 | | 100 | % | $ | 4,575,457 | | 100 | % | $ | 4,378,458 | | 100 | % |
The Company obtains deposits from a cross-section of the communities it serves. The Company’s business is not generally seasonal in nature. Public funds were less than 1% of deposits at September 30, 2024, September 30, 2023, and December 31, 2023.
Total deposits increased $154.1 million, or 3%, to $4.7 billion at September 30, 2024 from $4.6 billion at September 30, 2023. Total deposits increased $351.1 million, or 8%, from $4.4 billion at December 31, 2023. Migration of client deposits resulted in an increase in ICS/CDARS deposits to $997.8 million at September 30, 2024, compared to $921.2 million at September 30, 2023, and $854.1 million at December 31, 2023. Noninterest-bearing demand deposits increased $28.6 million, or 2%, to $1.27 billion at September 30, 2024, compared to $1.24 billion at September 30, 2023, and decreased ($20.3) million, or (2%), from $1.29 billion at December 31, 2023.
The Company had 25,373 deposits accounts at September 30, 2024, with an average balance of $186,000, compared to 24,769 deposit accounts at September 30, 2023, with an average balance of $185,000. At December 31, 2023, the Company had 24,737 deposit accounts, with an average balance of $177,000.
Deposits from the Bank’s top 100 client relationships, representing 22% of total deposits, totaled $2.2 billion, representing 47% of total deposits, with an average account size of $394,000 at September 30, 2024. At September 30, 2023, deposits from the Bank’s top 100 client relationships, representing 22% of the total number of accounts, totaled $2.2 billion, representing 48% of total deposits, with an average account size of $408,000. At December 31, 2023, deposits from the Bank’s top 100 client relationships, representing 22% of the total number of accounts, totaled $2.0 billion, representing 45% of total deposits, with an average account size of $368,000.
The Bank’s uninsured deposits were approximately $2.2 billion, or 47% of the Company’s total deposits, at September 30, 2024, compared to $2.1 billion, or 46% of the Company’s total deposits, at September 30, 2023, and $2.0 billion, or 46% of the Company’s total deposits at December 31, 2023.
At September 30, 2024, the $997.8 million ICS/CDARS deposits comprised $417.1 million of interest-bearing demand deposits, $293.3 million of money market accounts and $287.4 million of time deposits. At September 30, 2023, the $921.2 million ICS/CDARS deposits comprised $452.4 million of interest-bearing demand deposits, $305.8 million of money market accounts and $163.0 million of time deposits. At December 31, 2023, the $854.1 million ICS/CDARS deposits comprised $425.0 million of interest-bearing demand deposits, $189.9 million of money market accounts and $239.2 million of time deposits.