Marcy Mutch
Analyst · Piper Jaffray
Thanks, Kevin, and good morning, everyone. Most of our variances relative to the second quarter are a result of the full quarter impact of Bank of the Cascades. So as I walk through our financial results, I'll focus on the areas where there were other factors contributing to the quarter-over-quarter variances.
As Kevin indicated earlier in the call, we're pleased with our strong quarter of operating earnings and I'll begin with our income statement and our net interest margin. Our reported margin increased 11 basis points to 3.71%. Excluding the impact of charged-off interest and loan accretion income, our operating net interest margin increased 11 basis points to 3.54%. The expansion in our margin is attributable to more of our floating-rate loans rising above their floors. We're also benefiting from a higher mix of variable-rate loans in the portfolio, which now represents approximately 50% of total loans.
And as Kevin mentioned, we're seeing more stability in our deposit costs.
Total accretion income on the acquired portfolios was $2.7 million this quarter, an increase of $1 million compared to the prior quarter. Early payoffs contributed $1.7 million to accretion income this quarter, up from $300,000 in the prior quarter.
While the unpredictability of early payoffs continue to cause volatility in our accretion income, we anticipate that scheduled accretion income will contribute approximately $1.8 million next quarter, which will taper off to an average of $1.4 million per quarter in 2018.
Looking forward, absent any additional Fed rate increases, we would expect to see a relatively stable operating net interest margin.
Moving to noninterest income. We generated $38.3 million of revenue in the third quarter. As you may recall, we sold the custodial rights of our health savings accounts held by both First Interstate and Bank of the Cascades, which resulted in a $3.4 million gain in the second quarter. Then during the third quarter, we recorded a $300,000 purchase price reduction due to attrition in the HSA portfolios between the date of the sale and the conversion of the account balances this quarter.
When the impact of the HSA sale is excluded from both quarters, our noninterest income increased $4.8 million or 14.3%, which was primarily due to the full quarter contribution of Bank of the Cascades as well as the positive impact we typically see in payment services revenue during the third quarter, which stems from seasonal spending habits.
Mortgage banking revenues increased by approximately $600,000 from the prior quarter, with originations for home purchases accounting for 78% of our total production this quarter. Consistent with national trends, we continue to see lower demands for refinancing given the rising mortgage rate environments.
Wealth Management also had a strong quarter with revenues increasing 9% over the prior quarter and 11% over the same period in 2016. At the end of September, our assets under management were approximately $4.8 billion.
Investment security losses of $357,000 this quarter includes $771,000 of gain on the sale of securities, which was offset by a $1.1 million payment to terminate our existing interest rate swap contract.
As a result of the acquisition, our higher levels of core funding available made it unnecessary to execute the swap contract and take down additional funding.
Moving to total noninterest expense. This increased $14 million quarter-over-quarter, mainly as a result of the acquisition costs and the addition of Bank of the Cascades. During the quarter, we recognized $13 million of acquisition-related expenses. Another significant contributor to the variance from the prior quarter was approximately $1 million of nonacquisition-related severance expense along with the hiring costs of our 2 new executives.
So as Kevin mentioned earlier, acquisition expenses had a $0.15 impact on earnings per share. Nonacquisition-related employee expenses, along with the purchase price adjustment on the HSA sale, had another $0.02 impact.
If you back out acquisition expenses and security losses, our normal operating efficiency ratio this quarter was a new low of 56.4%.
In terms of the future expense run rate, last quarter, I was a little prematurely optimistic. And as we've updated our model, the majority of the cost savings from the Cascade integration will be in place for the fourth quarter. However, the cost saves will be more in line with our originally modeled 28% expectations, which means our total operating expenses will be closer to $78 million per quarter.
Looking at the balance sheet. Our total loans were just about flat from the end of the prior quarter. We saw our strongest growth in the construction portfolio, which was offset by declines in commercial loans and residential real estate loan balances. We also continue to see consistent growth in the indirect auto portfolio, which was up nearly $10 million in the quarter.
Our total deposits declined by $87 million, which was mainly attributable to the sale of the HSA portfolio, which resulted in an outflow of $55 million of interest-bearing deposits.
Moving to asset quality. We saw general improvement across the portfolio with decreases in nonperforming assets, other real estate, nonaccrual loans and criticized loans. We had net charge-offs of $4.6 million or 24 basis points of average loans, which was higher than our loss experience in the last couple of quarters.
Our net charge-offs this quarter were comprised of several loans for which $2.6 million of specific reserves had been established in prior quarters and we took those charge-offs as part of the final resolution of these loans.
Due to the higher level of charge-offs, our provision expense increased a bit to $3.4 million for the quarter. This brought our overall allowance level to 99 basis points of total loans.
Adjusting for the credit mark on acquired loans, the allowance level was 1.39% of total loans as compared to 1.38% at the end of the second quarter.
With that, I'll turn the call back over to Kevin. Kevin?