Thank you, Jeff. And I would also like to thank everyone for joining us today. As Jeff mentioned, we reported earnings of $0.62 per share for the quarter with the return on average assets of 1.15% return on tangible common equity of 14.82% and in efficiency ratio of 58%.
I would now like to touch on 4 specific items related to the earnings release. First, our provision for credit losses was $3.9 million for the quarter, which was primarily driven by the $257.4 million increase in loans. During the third quarter, we saw stabilization in the economic assumptions used within our CECL model. As of September 30th, our allowance for credit losses was 1.95% of total loans and leases when excluding PPP loans. This represented an increase of one basis point compared to June 30th.
Second, as expected we experienced net interest margin compression during the third quarter. Reported NIM of 3.02%, decreased 16 basis points when compared to the second quarter. Reported NIM was negatively impacted by 18 basis points of excess liquidity, which averaged $329 million for the quarter and 10 basis points due to low-yielding PPP loans on the balance sheet. Core margin excluding excess liquidity and the PPP impact was 3.30%, a decrease of 13 basis points when compared to the second quarter. As a reminder, third quarter NIM was reduced by approximately 6 basis points due to the $100 million sub-debt issuance on August 5th.
Third, as it relates to non-interest income, our mortgage banking business continues to have a great year. For the quarter, our net gain on mortgage banking totaled $5.9 million, which represented a year-over-year increase of $4.2 million. For the 9 months ended September 30th, 2020, our net gain on mortgage banking totaled $12.1 million, an increase of $9.2 million when compared to the same period in 2019.
Additionally, noninterest income included swap fees of $2.3 million for the third quarter, which was an increase of $2.2 million compared to the third quarter of 2019. For the 9 months ended September 30th, 2020 swap fees totaled $4.1 million representing an increase of $3.4 million when compared to 2019.
Fourth, noninterest expense was slightly elevated due to compensation cost associated with strong performance of the mortgage banking business. Variable compensation cost for this business totaled 830,000 for the third quarter. This is an increase of 535,000 versus the third quarter of 2019.
When you normalize expenses for these variable compensation cost and the FDIC assessment credit, which was recognized in the third quarter of 2019, expenses are up 1.98% year-over-year. As Jeff mentioned, on October 19th we announced the plan to close or relocate 20% of our financial centers. Pretax one-time cost associated with this plan are estimated to be $1.7 million, which will primarily be [indiscernible] during the fourth quarter of 2020.
The estimated pre-tax annualized savings are approximately $2.4 million. It is important to note the plan includes 2 phases. As such, the expected pre-tax savings for 2021 is approximately $1.8 million. In closing, our strong performance during the third quarter highlights the value of our diversified business model. This diversification enabled us to produce strong results despite the inherent headwinds from COVID-19 and the current interest rate environment.
That is it for my prepared remarks. We will be happy to answer any questions. Operator, would you please begin the question-and-answer session.