Securities (Tables)

9 Months Ended

Sep. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Amortized cost and fair value of investments classified as available-for-sale

	September 30, 2020
(Dollar amounts in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. Government agencies	$	94,924	$	5,430	$	(4)	$	100,350
Mortgage Backed Securities - residential	276,182		8,710		(282)		284,610
Mortgage Backed Securities - commercial	18,046		634		—		18,680
Collateralized mortgage obligations	225,964		5,821		(217)		231,568
State and municipal obligations	276,640		18,200		(86)		294,754
Municipal taxable	20,106		624		(3)		20,727
U.S. Treasury	2,500		14		—		2,514
Collateralized debt obligations	—		3,036		—		3,036
TOTAL	$	914,362	$	42,469	$	(592)	$	956,239

	December 31, 2019
(Dollar amounts in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. Government agencies	$	102,490	$	1,293	$	(150)	$	103,633
Mortgage Backed Securities-residential	240,753		2,979		(350)		243,382
Mortgage Backed Securities-commercial	22,036		73		(5)		22,104
Collateralized mortgage obligations	280,797		1,735		(1,221)		281,311
State and municipal obligations	253,277		11,265		(108)		264,434
Municipal taxable	728		2		—		730
U.S. Treasury	7,494		10		—		7,504
Collateralized debt obligations	—		3,619		—		3,619
TOTAL	$	907,575	$	20,976	$	(1,834)	$	926,717

Schedule of contractual maturities of debt securities

Contractual maturities of debt securities at September 30, 2020 were as follows. Securities not due at a single maturity or with no maturity date, primarily mortgage-backed and equity securities are shown separately.

	Available-for-Sale
	Amortized		Fair
(Dollar amounts in thousands)	Cost		Value
Due in one year or less	$	7,881	$	7,943
Due after one but within five years	52,873		54,507
Due after five but within ten years	67,655		71,408
Due after ten years	265,761		287,523
	394,170		421,381
Mortgage-backed securities and collateralized mortgage obligations	520,192		534,858
TOTAL	$	914,362	$	956,239

Schedule of gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in continuous unrealized loss position

The following tables show the securities’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in continuous unrealized loss position, at September 30, 2020 and December 31, 2019. 

	September 30, 2020
	Less Than 12 Months				More Than 12 Months				Total
			Unrealized				Unrealized				Unrealized
(Dollar amounts in thousands)	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
U.S. Government agencies	$	5,017	$	(2)	$	998	$	(2)	$	6,015	$	(4)
Mortgage Backed Securities - Residential	$	37,117	$	(282)	$	—	$	—	$	37,117	$	(282)
Collateralized mortgage obligations	5,702		(124)		3,716		(93)		9,418		(217)
State and municipal obligations	8,059		(64)		452		(22)		8,511		(86)
Municipal taxable	747		(3)		—		—		747		(3)
Total temporarily impaired securities	$	56,642	$	(475)	$	5,166	$	(117)	$	61,808	$	(592)

	December 31, 2019
	Less Than 12 Months				More Than 12 Months				Total
			Unrealized				Unrealized				Unrealized
(Dollar amounts in thousands)	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
US Government agencies	$	29,183	$	(150)	$	—	$	—	$	29,183	$	(150)
Mortgage Backed Securities - Residential	$	55,665	$	(243)	$	18,724	$	(107)	$	74,389	$	(350)
Mortgage Backed Securities - Commercial	4,391		(5)		—		—		4,391		(5)
Collateralized mortgage obligations	33,398		(314)		61,781		(907)		95,179		(1,221)
State and municipal obligations	8,996		(61)		461		(47)		9,457		(108)
Total temporarily impaired securities	$	131,633	$	(773)	$	80,966	$	(1,061)	$	212,599	$	(1,834)

Rollforward of the credit losses recognized in earnings

The table below presents a rollforward of the credit losses recognized in earnings for the three and nine month periods ended September 30, 2020 and 2019:

	Three Months Ended September 30,				Nine Months Ended September 30,
(Dollar amounts in thousands)	2020		2019		2020		2019
Beginning balance	$	2,974	$	2,974	$	2,974	$	2,974
Increases to the amount related to the credit
Loss for which other-than-temporary was previously recognized	—		—		—		—
Reductions for increases in cash flows collected	—		—		—		—
Reductions for securities called during the period	—		—		—		—
Ending balance	$	2,974	$	2,974	$	2,974	$	2,974