Note 3 - Investment Securities

9 Months Ended

Sep. 30, 2023

Notes to Financial Statements

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

Note 3.  Investment Securities

All of the Company’s investment securities are classified as available-for-sale as of September 30, 2023 and December 31, 2022. Investment securities available-for-sale are reported at fair value with unrealized gains or losses included in stockholders’ equity, net of tax. Accordingly, the carrying value of such securities reflects their fair value as of September 30, 2023 and December 31, 2022. Fair value is based upon either quoted market prices, or in certain cases where there is limited activity in the market for a particular instrument, assumptions are made to determine their fair value. See Note 6 of the Notes to Consolidated Financial Statements for further discussion.

The following tables present information related to the Company’s portfolio of securities available-for-sale as of September 30, 2023 and December 31, 2022.

										Allowance
										for
			Gross		Gross					Investment
	Amortized		Unrealized		Unrealized			Fair		Credit
	Cost		Gains		Losses			Value		Losses
	(dollars in thousands)
September 30, 2023
Investment securities available-for-sale:
Federal agency obligations	$	57,243	$	-	$	(13,274	)	$	43,969	$	-
Residential mortgage pass-through securities		466,362		-		(76,935	)		389,427		-
Commercial mortgage pass-through securities		25,303		-		(5,376	)		19,927		-
Obligations of U.S. states and political subdivisions		150,218		-		(27,319	)		122,899		-
Corporate bonds and notes		3,000		-		(39	)		2,961		-
Asset-backed securities		1,354		-		(32	)		1,322		-
Other securities		1,362		-		-			1,362		-
Total investment securities available-for-sale	$	704,842	$	-	$	(122,975	)	$	581,867	$	-
December 31, 2022
Investment securities available-for-sale:
Federal agency obligations	$	54,889	$	-	$	(10,439	)	$	44,450	$	-
Residential mortgage pass-through securities		475,263		178		(57,863	)		417,578		-
Commercial mortgage pass-through securities		25,485		-		(4,381	)		21,104		-
Obligations of U.S. states and political subdivisions		157,247		111		(14,462	)		142,896		-
Corporate bonds and notes		7,000		-		(26	)		6,974		-
Asset-backed securities		1,673		-		(33	)		1,640		-
Other securities		242		-		-			242		-
Total investment securities available-for-sale	$	721,799	$	289	$	(87,204	)	$	634,884	$	-

Investment securities having a carrying value of approximately $332.5 million and $157.0 million as of September 30, 2023 and December 31, 2022, respectively, were pledged to secure public deposits, borrowings, repurchase agreements, access to unutilized Federal Reserve Discount Window, Bank Term Funding Program ("BTFP") borrowings, and access to unutilized Federal Home Loan Bank advances and for other purposes required or permitted by law. As of September 30, 2023 and December 31, 2022, there were no holdings of securities of any one issuer, other than the U.S. Government and its agencies, in an amount greater than 10% of stockholders’ equity.

The following table presents information for investments in securities available-for-sale as of September 30, 2023, based on scheduled maturities. Actual maturities can be expected to differ from scheduled maturities due to prepayment or early call options of the issuer. Securities not due at a single maturity date are shown separately.

	September 30, 2023
	Amortized		Fair
	Cost		Value
	(dollars in thousands)
Investment securities available-for-sale:
Due in one year or less	$	2,000	$	1,967
Due after one year through five years		4,389		4,331
Due after five years through ten years		1,856		1,783
Due after ten years		203,570		163,070
Residential mortgage pass-through securities		466,362		389,427
Commercial mortgage pass-through securities		25,303		19,927
Other securities		1,362		1,362
Total investment securities available-for-sale	$	704,842	$	581,867

There were no realized gains or losses on securities during the nine months ended September 30, 2023 and September 30, 2022.

Impairment Analysis of Available-for-Sale Debt Securities

The following tables indicate securities in an unrealized loss position for which an allowance for credit losses (“ACL”) has not been recorded, aggregated by investment category and by the length of continuous time individual securities have been in an unrealized loss position as of September 30, 2023 and December 31, 2022.

	September 30, 2023
	Total					Less than 12 Months					12 Months or Longer
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Losses			Value		Losses			Value		Losses
	(dollars in thousands)
Investment securities available-for-sale:
Federal agency obligations	$	43,969	$	(13,274	)	$	6,056	$	(194	)	$	37,913	$	(13,080	)
Residential mortgage pass-through securities		389,427		(76,935	)		28,555		(858	)		360,872		(76,077	)
Commercial mortgage pass-through securities		19,927		(5,376	)		-		-			19,927		(5,376	)
Obligations of U.S. states and political subdivisions		122,899		(27,319	)		22,739		(1,825	)		100,160		(25,494	)
Corporate bonds and notes		2,961		(39	)		994		(6	)		1,967		(33	)
Asset-backed securities		1,322		(32	)		-		-			1,322		(32	)
Total temporarily impaired securities	$	580,505	$	(122,975	)	$	58,344	$	(2,883	)	$	522,161	$	(120,092	)

	December 31, 2022
	Total					Less than 12 Months					12 Months or Longer
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Losses			Value		Losses			Value		Losses
	(dollars in thousands)
Investment securities available-for-sale:
Federal agency obligations	$	44,451	$	(10,439	)	$	20,517	$	(1,831	)	$	23,934	$	(8,608	)
Residential mortgage pass-through securities		403,039		(57,863	)		218,918		(13,869	)		184,121		(43,994	)
Commercial mortgage pass-through securities		21,105		(4,381	)		14,523		(2,304	)		6,582		(2,077	)
Obligations of U.S. states and political subdivisions		133,265		(14,462	)		47,446		(3,404	)		85,819		(11,058	)
Corporate bonds and notes		4,973		(26	)		4,973		(26	)		-		-
Asset-backed securities		1,640		(33	)		1,048		(16	)		592		(17	)
Total temporarily impaired securities	$	608,473	$	(87,204	)	$	307,425	$	(21,450	)	$	301,048	$	(65,754	)

The Company has elected to exclude accrued interest from the amortized cost of its investment securities available-for-sale. Accrued interest receivable for investment securities available-for-sale as of September 30, 2023 and December 31, 2022, totaled $2.1 million and $2.4 million, respectively.

The Company evaluates securities in an unrealized loss position for impairment related to credit losses on at least a quarterly basis. Securities in unrealized loss positions are first assessed as to whether we intend to sell, or if it is more likely than not that we will be required to sell the security before recovery of its amortized cost basis. If one of the criteria is met, the security’s amortized cost basis is written down to fair value through current earnings. For securities that do not meet these criteria, the Company evaluates whether the decline in fair value resulted from credit losses or other factors. If this assessment indicates that a credit loss exists, we compare the present value of cash flows expected to be collected from the security with the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis for the security, a credit loss exists and an allowance for credit losses is recorded, limited to the amount that the fair value of the security is less than its amortized cost basis. Unrealized losses on asset backed securities and state and municipal securities have not been recognized into income because the issuers are of high credit quality and we do not intend to sell and it is likely that we will not be required to sell the securities prior to their anticipated recovery. The decline in fair value is largely due to changes in interest rates and other market conditions. The issuers continue to make timely principal and interest payments on the securities. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income, net of applicable taxes. No allowance for credit losses for available-for-sale securities was recorded as of September 30, 2023.

Federal agency obligations, residential mortgage-backed pass-through securities and commercial mortgage-backed pass-through securities are issued by U.S. Government agencies and U.S. Government sponsored enterprises. Although a government guarantee exists on these investments, these entities are not legally backed by the full faith and credit of the federal government, and the current support they receive is subject to a cap as part of the agreement entered into in 2008. Nonetheless, at this time we do not foresee any set of circumstances in which the government would not fund its commitments on these investments as the issuers are an integral part of the U.S. housing market in providing liquidity and stability. Therefore, we concluded that a zero-allowance approach for these investment securities is appropriate.