Thank you, Colin. Good morning, everyone. This is Craig Blunden, Chairman and CEO of Provident Financial Holdings. And on the call with me is Donavon Ternes, our President, Chief Operating and Chief Financial Officer.
Before we begin, I have a brief administrative item to address. Our presentation today discusses the company's business outlook and will include forward-looking statements. Those statements include descriptions of management's plans, objectives or goals for future operations, products or services, forecasts of financial or other performance measures and statements about the company's general outlook for economic and business conditions. We also may make forward-looking statements during the question-and-answer period following management's presentation. These forward-looking statements are subject to a number of risks and uncertainties, and actual results may differ materially from those discussed today. Information on the risk factors that could cause actual results to differ from any forward-looking statement is available from the earnings release that was distributed yesterday, from the annual report on Form 10-K for the year ended June 30, 2017, and from the Form 10-Qs that were filed subsequent to the Form 10-K. Forward-looking statements are effective only as of the date they're made and that the company assumes no obligation to update this information.
To begin with, thank you for participating in our call. I hope that each of you has had an opportunity to review our earnings release, which describes our first quarter results.
I'd like to begin this morning by highlighting the results in our community banking business. Over the course of the last year, our net interest margin expanded. Our loan growth has been consistent. Core deposits have continued to grow, and credit quality remained strong.
In the most recent quarter, the loans originated and purchased for investment decreased to $20 million from $43 million in the prior sequential quarter, and single-family loans originated by portfolio from the mortgage banking division decreased to $25 million in the September 2017 quarter from $31 million in the prior sequential quarter. Although the portfolio loan volume was down on a sequential quarter basis, it is too early to suggest that this is a newly developing trend, particularly since our volume can be influenced in any particular quarter. Our loan purchases in [indiscernible] adjustable to single-family loan product.
During the quarter, we also experienced $43.4 million of loan principal payments and payoffs, which is down from $45.5 million in the June 2017 quarter, but still tempering the growth rate of loans held for investment.
For the 12 months ended September 30, 2017, loans held for investment increased by approximately 6%, a reasonable pace of growth. And preferred loans, a component of loans held for investment, grew at an 8% rate. We're comfortable with the growth rate because, in our view, a more rapid pace would necessitate a loosening of underwriting standards as opposed against our credit culture.
I'd also like to point out that the single-family portfolio balance increased for the fourth consecutive quarter because the rise in mortgage interest rates has resulted in an increase in adjustable rate originations and purchase opportunities. We welcome this change in adjustable-rate single-family market conditions and believe it will result in future opportunities to grow our loan portfolio.
We're also pleased with credit quality. You will note that the early-stage delinquencies are approximately $1.5 million at September 30, 2017, up from the $1 million balance at June 30, 2017, but still very low from entire credit cycle perspective. In fact, total criticized and classified assets remained at very low levels and are now just $12.9 million, which was down from the $22.4 million at September 30, 2016, 32% over the course of the year.
For the first time in many quarters, we experienced a modest net charge-off of $145,000 during the quarter ended September 30, 2017, compared to recoveries of $141,000 for the June 2017 quarter and net recoveries of $49,000 during the March 2017 quarter. As a result, coupled with modest portfolio loan growth, we reported $169,000 provision for loan losses in the 2017 [ quarter ], reversing a very long trend in negative provisions. Nonetheless, we're pleased with these credit quality results.
Our net interest margin expanded by 8 basis points in the September 2017 quarter in comparison to the June 2017 sequential quarter as a result of a 10 basis point increase in average yield and total interest-earning assets and no change of cost of interest-bearing liabilities. It should be noted that our deposit costs declined by 1 basis point in the September 2017 quarter when compared to the June sequential quarter, and deposit costs declined by 5 basis points when compared to the September 2016 quarter last year. Over the course of the last year, we've been able to hold on, on the cost of core deposits while decreasing the balance in cost of time deposits.
You will note that we're still adjusting our mortgage banking business model to respond to a generally poor mortgage banking environment. We currently employ 237 FTE in mortgage banking, down from the 253 FTE employed on June 30, 2017. During the quarter, we've decreased our loan origination staff by 4 professionals, while our fulfillment staff declined by 12 professionals. The adjustments are more pronounced for the calendar year-to-date [indiscernible] origination staff has declined by 18%, and our fulfillment staff has declined by 25% for a total reduction of 23% in the mortgage banking division. We, like competitors, are responding to the less favorable environment by taking capacity out of our platform. It is unclear today when sufficient capacity [indiscernible] the industry to allow mortgage banking originators to return to profitable operations.
Additionally, we're moving into the holiday season where seasonality will play a more important role in origination borrowings because the December and March quarters are typically slower origination quarters, particularly on a purchase money market.
New applications decreased in the September 2017 quarter, and there was a weakness in new applications toward the end of the quarter. Based on current information, we would expect volumes in the December 2017 quarter to be lower than the volumes at the September 2017 quarter and lower than the volumes at the December 2016 quarter last year. The loan sale margin for the quarter ended September 30, 2017, decreased from the prior sequential quarter and has declined to the lower end of the range as pricing pressure has increased throughout the industry. Market participants were pricing more aggressively in an effort to maintain market share. We will continue to adjust our business model and FTE count as we have in the past, commensurate with changes in market opportunities and the mortgage banking operating environment.
During the past 9 months, we have reduced capacity more closely aligned to the current opportunities in the market, which reflect an uptick in purchase money activity and a significant decline in refinance activity.
Additionally, we're in the process of converting to the new loan origination system, which will be much more efficient for our mortgage banking operations when fully implemented. The new system will allow us to move more quickly to a paperless environment and to streamline the application, processing, underwriting and funding functions for customers, third-party service providers and employees.
Our short-term strategy for balance sheet management is unchanged from the last quarter, and we believe that leveraging the balance sheet with prudent loan portfolio growth is the best course of action. For the foreseeable future, we believe that maintaining a significant cushion above the regulatory capital ratios of 8% for Tier 1 leverage, 9.5% for common equity Tier 1 and 13% total risk-based is essential, and we're confident we will be able to do so. We currently exceed each of these ratios by a significant margin, demonstrating that we have the capital to execute on our business plan and capital management goals.
Additionally, in the September 2017 quarter, we repurchased approximately 126,000 shares of our common stock and continue to believe that executing on stock repurchases is a wise use of capital in the current environment. Over the course of the year last year, we've executed substantial returns of capital to shareholders in the form of cash dividends and stock repurchases.
We encourage everyone to review our September 30 investor presentation posted on our website. You will find that we've included slides regarding financial metrics, community banking, mortgage banking, asset quality and capital management, which we believe will give you additional insight on our strong financial foundation, supporting the future growth of the company.
We will now entertain any questions you may have regarding our financial results. Thank you. Colin?