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Investment Securities (Tables)

12 Months Ended

Dec. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Unrealized Gain (Loss) on Investments [Table Text Block]

The following tables present information related to the Company’s portfolio of securities available-for-sale as of December 31, 2021 and 2020.

		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
		(dollars in thousands)
December 31, 2021
Investment securities available-for-sale
Federal agency obligations		$	50,336			$	649			$	(625	)		$	50,360
Residential mortgage pass-through securities			317,111				1,868				(2,884	)			316,095
Commercial mortgage pass-through securities			10,814				118				(463	)			10,469
Obligations of U.S. states and political subdivisions​​			145,045				1,562				(982	)			145,625
Corporate bonds and notes			8,968				81				-				9,049
Asset-backed securities			2,563				3				(2	)			2,564
Certificates of deposit			150				-				-				150
Other securities			195				-				-				195
Total securities available-for-sale		$	535,182			$	4,281			$	(4,956	)		$	534,507

		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
		(dollars in thousands)
December 31, 2020
Investment securities available-for-sale
Federal agency obligations		$	37,015			$	1,508			$	(65	)		$	38,458
Residential mortgage pass-through securities			266,114				4,811				(41	)			270,884
Commercial mortgage pass-through securities			6,906				203				(187	)			6,922
Obligations of U.S. states and political subdivisions​​			138,539				4,269				-				142,808
Corporate bonds and notes			24,925				222				(52	)			25,095
Asset-backed securities			3,521				-				(41	)			3,480
Certificates of deposit			149				2				-				151
Other securities			157				-				-				157
Total securities available-for-sale		$	477,326			$	11,015			$	(386	)		$	487,955

Investments Classified by Contractual Maturity Date [Table Text Block]

The following table presents information for investments in securities available-for-sale as of December 31, 2021, 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.

		December 31, 2021
		Amortized Cost				Fair Value
		(dollars in thousands)
Investment Securities Available-for-Sale:
Due in one year or less		$	3,045			$	3,051
Due after one year through five years			10,203				10,280
Due after five years through ten years			5,136				5,338
Due after ten years			188,678				189,079
Residential mortgage pass-through securities			317,111				316,095
Commercial mortgage pass-through securities			10,814				10,469
Other securities			195				195
Total securities available-for-sale		$	535,182			$	534,507

Schedule of Realized Gain (Loss) [Table Text Block]

Gross gains and losses from the sales and redemptions of investment securities for the years ended December 31, 2021, 2020 and 2019 were as follows:

		Years Ended December 31,
		2021				2020				2019
		(dollars in thousands)
Proceeds		$	5,185			$	19,624			$	183,728
Gross gains on sales/redemptions of investment securities		$	195			$	29			$	401
Gross losses on sales/redemptions of investment securities			-				-				(681	)
Net gains (losses) on sales/redemptions of investment securities​​			195				29				(280	)
Tax provision on net gains			(48	)			(6	)			79
Net gains (losses) on sales/redemptions of investment securities, after tax​​		$	147			$	23			$	(201	)

Schedule of Unrealized Loss on Investments [Table Text Block]

The following tables indicate gross unrealized losses for which an 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 December 31, 2021 and December 31, 2020.

		December 31, 2021
		Total								Less than 12 Months								12 Months or Longer
		Fair Value				Unrealized Losses				Fair Value				Unrealized Losses				Fair Value				Unrealized Losses
		(dollars in thousands)
Investment Securities Available-for-Sale:
Federal agency obligation		$	28,974			$	(625	)		$	28,974			$	(625	)		$	-			$	-
Residential mortgage pass-through securities			246,396				(2,884	)			214,701				(2,111	)			31,695				(773	)
Commercial mortgage pass-through securities			8,370				(463	)			4,682				(75	)			3,688				(388	)
Obligations of U.S. states and political subdivisions			89,473				(982	)			89,473				(982	)			-				-
Asset-backed securities			802				(2	)			802				(2	)			-				-
Total Temporarily Impaired Securities		$	374,015			$	(4,956	)		$	338,632			$	(3,795	)		$	35,383			$	(1,161	)

		December 31, 2020
		Total								Less than 12 Months								12 Months or Longer
		Fair Value				Unrealized Losses				Fair Value				Unrealized Losses				Fair Value				Unrealized Losses
		(dollars in thousands)
Investment Securities Available-for-Sale:
Federal agency obligation		$	8,978			$	(65	)		$	8,975			$	(65	)		$	3			$	-
Residential mortgage pass-through securities			20,895				(41	)			20,886				(41	)			9				-
Commercial mortgage pass-through securities			3,954				(187	)			3,954				(187	)			-				-
Corporate bonds and notes			3,928				(52	)			3,928				(52	)			-				-
Asset-backed securities			3,083				(41	)			622				-				2,461				(41	)
Total Temporarily Impaired Securities		$	40,838			$	(386	)		$	38,365			$	(345	)		$	2,473			$	(41	)

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Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales.

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