Balance Sheet Summary
Balance sheet changes during the first nine months of 2021 include an increase in total assets of $222.0 million, or 7%, primarily a result of increases in cash and due from banks and investments securities of $350.9 million and $188.3 million, respectively, net of a $320.6 million decrease in net loan balances.
The increase in investment securities of $188.3 million for the year-to-date period consisted primarily of increases in government and agency securities, including mortgage backed securities and collateralized mortgage obligations, of $13.2 million; municipal bonds of $64.3 million; corporate securities of $16.3 million; and AAA and AA tranches of collateralized loan obligations of $94.6 million. The purchases of AAA and AA tranches of collateralized loan obligations (“CLOs”) in the third quarter of 2021 is primarily a balance sheet diversification strategy as management continues to utilize available liquidity. In addition to providing asset class diversification given the high level of real estate backed earning assets on the balance sheet, these floating rate CLOs are more asset sensitive which complements the longer-term fixed-rate earning assets.
Loan balances increased $14.4 million, excluding the impact of the change in SBA PPP loans. SBA PPP loan forgiveness totalled $17.9 million during the third quarter of 2021 as compared to the end of the previous quarter. However, as mentioned above, loan balances declined by $320.6 million as compared to December 31, 2020 primarily as a result of a $181.2 million decline in mortgage warehouse line utilization, a $76.8 million decline in SBA PPP loans due mostly to forgiveness of such loans, and a net decrease of $63.0 million in real estate secured loans, primarily from construction and other commercial real estate loans.
During 2021, the Company strategically lowered its regulatory commercial real estate concentration ratio from 378% at December 31, 2020 to 308% at September 30, 2021, although it is expected to moderately increase this concentration ratio during the fourth quarter of 2021 and into 2022. The overall decline in real estate secured loans during 2021 was partially offset by an increase of $80.4 million in 1-4 family residential real estate loans due to the $121.6 million purchase of mortgage loans during the third quarter of 2021. These loan purchases were designed as a bridge to organic loan growth as the Bank’s core loan pipeline continues to improve and the hiring of one or more loan teams that is expected to occur during the fourth quarter of 2021. If successfully hired, the loan teams are anticipated to further diversify the loan portfolio by specializing in various types of commercial and industrial loans.
Unused commitments, excluding mortgage warehouse and consumer overdraft lines, were $224.3 million at September 30, 2021, compared to $260.0 million at December 31, 2020. Total line utilization, excluding mortgage warehouse and consumer overdraft lines, was 54% at September 30, 2021 and 57% at December 31, 2020. Mortgage warehouse utilization declined significantly to 33% at September 30, 2021, as compared to 71% at December 31, 2020.
The Company participated in the SBA PPP as authorized by the CARES Act. We began accepting and funding loans under this program in April 2020. There were 642 loans for $50.7 million outstanding at September 30, 2021, compared to 1,274 loans for $117.2 million at December 31, 2020. During the third quarter of 2021 the SBA forgave $17.9 million of SBA PPP loans.
Deposit balances reflect growth of $196.0 million, or 7%, during the first nine months of 2021. Core non-maturity deposits increased by $358.2 million, or 17%, while customer time deposits decreased by $122.1 million, or 30%. Wholesale brokered deposits decreased by $40.0 million to $60.0 million. Overall noninterest-bearing deposits as a percent of total deposits at September 30, 2021, increased to 39.4%, as compared to 36.0% at December 31, 2020.
Other interest-bearing liabilities of $92.6 million on September 30, 2021 consists exclusively of customer repurchase agreements. Other interest-bearing liabilities at December 31, 2020 of $182.0 million consisted of $100.0 million of fed funds purchased, $39.1 million of customer repurchase agreements, $37.9 million of FHLB overnight borrowings and $5.0 million of FHLB short term borrowings.
Long term debt increased to $49.2 million from the issuance of $50 million in 3.25% fixed – floating subordinated debt with a ten-year maturity in the third quarter of 2021. The Company plans on contributing $25 million of additional