due in part to seasonal outflows of municipal deposits and commercial depositors drawing down their noninterest-bearing balances.
The deposit base consisted of 42.8% retail accounts, 33.5% commercial accounts, 15.6% municipal relationships and 8.1% brokered deposits at March 31, 2024. At March 31, 2024, total estimated uninsured deposits, were $798.6 million, or approximately 24.9% of total deposits as compared to $883.5 million, or 26.9% of total deposits at December 31, 2023. Included in the uninsured total at March 31, 2024 is $345.8 million of municipal deposits collateralized by letters of credit issued by the FHLB and pledged investment securities, and $1.2 million of affiliate company deposits. As an additional resource to our uninsured depositors, we offer all depositors access to IntraFi's CDARS and ICS programs which allows deposit customers to obtain full FDIC deposit insurance while maintaining their relationship with our Bank.
In addition to deposit gathering and our current long term borrowings, we have additional sources of liquidity available such as cash and cash equivalents, overnight borrowings from the FHLB, the Federal Reserve’s Discount Window and Borrower-in-Custody program, correspondent bank lines of credit, brokered deposit capacity and unencumbered securities. At March 31, 2024, the Company had $110.0 million in cash and cash equivalents, a decrease of $77.4 million from December 31, 2023. At March 31, 2024, we had $1.7 billion in available additional liquidity representing 46.2% of total assets, 52.9% of total deposits and 212.3% of uninsured deposits. For additional information on our deposit portfolio and additional sources of liquidity, see the tables on page 14.
The Company maintained its well capitalized position at March 31, 2024. Stockholders' equity equaled $340.0 million or $48.18 per share at March 31, 2024, and $340.4 million or $48.35 per share at December 31, 2023. The decrease in stockholders’ equity from December 31, 2023 is primarily attributable to an increase to accumulated other comprehensive loss (“AOCI”) resulting from an increase in the unrealized loss on available for sale securities. The net after tax unrealized loss on available for sale securities included in AOCI at March 31, 2024 and December 31, 2023 was $42.2 million and $40.3 million, respectively.
Tangible stockholders' equity, a non-GAAP measure1, decreased to $39.20 per share at March 31, 2024, from $39.35 per share at December 31, 2023. Dividends declared for the three months ended March 31, 2024 amounted to $0.41 per share, representing a dividend payout ratio of 83.8% of net income.
ASSET QUALITY REVIEW
Asset quality metrics remained strong. Nonperforming assets were $7.7 million or 0.27% of loans, net and foreclosed assets at March 31, 2024, compared to $4.9 million or 0.17% of loans, net and foreclosed assets at December 31, 2023. As a percentage of total assets, nonperforming assets totaled 0.21% at March 31, 2024 compared to 0.13% at December 31, 2023. The increase in nonaccrual loans was primarily due to downgrading one loan totaling $2.65 million to nonaccrual. This loan is well secured and also carries a 70% government agency guaranty. At March 31, 2024, the Company had no foreclosed properties.
During the three month period ended March 31, 2024, net charge-offs were a nominal $6 thousand and our provision for credit losses totaled $0.7 million. The allowance for credit losses equaled $22.6 million or 0.79% of loans, net, at March 31, 2024 compared to $21.9 million or 0.77% of loans, net, at December 31, 2023. Loans charged-off, net of recoveries, for the three months ended March 31, 2024 were $6 thousand, compared to $9 thousand for the comparable period last year.
1See reconciliation of non-GAAP financial measures on pg.16-17