Nine months ended September 30, 2022 compared to nine months ended September 30, 2021
Other revenues increased primarily due to our equity method investments generating income in 2022 compared to losses in 2021. The decrease in personnel expense was primarily due to decreases in deferred compensation costs and the accrual for subjective bonuses, partially offset by increased salaries and benefits resulting from increases in average headcount. Other operating expenses increased as a result of the overall growth of the Company over the past year and from increased office costs and professional fees resulting from our acquisitions.
Liquidity and Capital Resources
Uses of Liquidity, Cash and Cash Equivalents
Our significant recurring cash flow requirements consist of liquidity to (i) fund loans held for sale; (ii) fund loans held for investment under the Interim Loan Program; (iii) pay cash dividends; (iv) fund our portion of the equity necessary for the operations of the Interim Program JV, and other equity-method investments; (v) fund investments in properties to be syndicated to LIHTC investment funds that we will asset-manage; (vi) make payments related to earnouts from acquisitions, (vii) meet working capital needs to support our day-to-day operations, including debt service payments, joint venture development partnerships contributions, servicing advances and payments for salaries, commissions, and income taxes,; and (viii) meet working capital to satisfy collateral requirements for our Fannie Mae DUS risk-sharing obligations and to meet the operational liquidity requirements of Fannie Mae, Freddie Mac, HUD, Ginnie Mae, and our warehouse facility lenders.
Fannie Mae has established benchmark standards for capital adequacy and reserves the right to terminate our servicing authority for all or some of the portfolio if, at any time, it determines that our financial condition is not adequate to support our obligations under the DUS agreement. We are required to maintain acceptable net worth as defined in the standards, and we satisfied the requirements as of September 30, 2022. The net worth requirement is derived primarily from unpaid balances on Fannie Mae loans and the level of risk-sharing. As of September 30, 2022, the net worth requirement was $275.0 million, and our net worth was $646.0 million, as measured at our wholly-owned operating subsidiary, Walker & Dunlop, LLC. As of September 30, 2022, we were required to maintain at least $54.7 million of liquid assets to meet our operational liquidity requirements for Fannie Mae, Freddie Mac, HUD, Ginnie Mae and our warehouse facility lenders. As of September 30, 2022, we had operational liquidity of $131.9 million, as measured at our wholly-owned operating subsidiary, Walker & Dunlop, LLC.
We paid a cash dividend of $0.60 per share for the third quarter of 2022, which is 20% higher than the quarterly dividend paid in the third quarter of 2021. On November 8, 2022, the Company’s Board of Directors declared a dividend of $0.60 per share for the third quarter of 2022. The dividend will be paid on December 9, 2022 to all holders of record of our restricted and unrestricted common stock as of November 25, 2022.
Over the past three years, we have returned $216.4 million to investors through the repurchase of 0.6 million shares of our common stock under share repurchase programs for a cost of $37.2 million and cash dividend payments of $179.2 million. Additionally, we have invested $655.1 million in acquisitions, $300.0 million of which was financed by an increase in our Term Loan (as defined below). On occasion, we may use cash to fully fund some loans held for investment or loans held for sale instead of using our warehouse lines. As of September 30, 2022, we did not fully fund any such loans. We continually seek opportunities to complete additional acquisitions if we believe the economics are favorable.
In February 2022, our Board of Directors approved a stock repurchase program that permits the repurchase of up to $75.0 million of shares of our common stock over a 12-month period beginning February 13, 2022. Through September 30, 2022 we have repurchased 109 thousand shares under the 2022 stock repurchase program and have $63.9 million of remaining capacity under that program.
Historically, our cash flows from operations and warehouse facilities have been sufficient to enable us to meet our short-term liquidity needs and other funding requirements. We believe that cash flows from operations will continue to be sufficient for us to meet our current obligations for the foreseeable future.
Restricted Cash and Pledged Securities
Restricted cash consists primarily of good faith deposits held on behalf of borrowers between the time we enter into a loan commitment with the borrower and the investor purchases the loan and cash held in collection accounts to be used to fund the repayment of the Alliant note payable. We are generally required to share the risk of any losses associated with loans sold under the Fannie Mae DUS program, our only off-