Investment Securities (Tables)

9 Months Ended

Sep. 30, 2021

Investment Securities [Abstract]

Schedule Of Investment Securities Classified As Available-for-sale And Held-to-maturity

Available-for-sale	September 30, 2021
			Gross		Gross
	Amortized		unrealized		unrealized		Fair
	cost		gains		losses		value
U.S. Government agency securities	$	37,489	$	1,680	$	(49)	$	39,120
Asset-backed securities *		368,502		481		(70)		368,913
Tax-exempt obligations of states and political subdivisions		3,559		181		—		3,740
Taxable obligations of states and political subdivisions		46,013		3,044		—		49,057
Residential mortgage-backed securities		193,037		6,442		(209)		199,270
Collateralized mortgage obligation securities		74,628		1,715		(1)		76,342
Commercial mortgage-backed securities		305,922		6,572		(1,218)		311,276
Corporate debt securities		10,000		—		(3,495)		6,505
	$	1,039,150	$	20,115	$	(5,042)	$	1,054,223

	September 30, 2021
			Gross		Gross
	Amortized		unrealized		unrealized		Fair
* Asset-backed securities as shown above	cost		gains		losses		value
Federally insured student loan securities	$	24,709	$	85	$	(14)	$	24,780
Collateralized loan obligation securities		343,793		396		(56)		344,133
	$	368,502	$	481	$	(70)	$	368,913

Available-for-sale	December 31, 2020
			Gross		Gross
	Amortized		unrealized		unrealized		Fair
	cost		gains		losses		value
U.S. Government agency securities	$	44,960	$	2,357	$	(120)	$	47,197
Asset-backed securities *		238,678		143		(460)		238,361
Tax-exempt obligations of states and political subdivisions		4,042		248		—		4,290
Taxable obligations of states and political subdivisions		47,884		4,180		—		52,064
Residential mortgage-backed securities		256,914		9,765		(96)		266,583
Collateralized mortgage obligation securities		145,260		3,281		(11)		148,530
Commercial mortgage-backed securities		359,125		12,717		(4,562)		367,280
Corporate debt securities		85,043		63		(3,247)		81,859
	$	1,181,906	$	32,754	$	(8,496)	$	1,206,164

	December 31, 2020
			Gross		Gross
	Amortized		unrealized		unrealized		Fair
* Asset-backed securities as shown above	cost		gains		losses		value
Federally insured student loan securities	$	28,013	$	38	$	(93)	$	27,958
Collateralized loan obligation securities		210,665		105		(367)		210,403
	$	238,678	$	143	$	(460)	$	238,361

Amortized Cost And Fair Value Of Investment Securities By Contractual Maturity

	Available-for-sale
	Amortized		Fair
	cost		value
Due before one year	$	1,215	$	1,214
Due after one year through five years		156,589		164,150
Due after five years through ten years		238,612		241,810
Due after ten years		642,734		647,049
	$	1,039,150	$	1,054,223

Available-for-sale And Held-to-maturity Securities, Continuous Unrealized Loss Position

Available-for-sale		Less than 12 months				12 months or longer				Total
	Number of securities		Fair Value		Unrealized losses		Fair Value		Unrealized losses		Fair Value		Unrealized losses
Description of Securities
U.S. Government agency securities	2	$	—	$	—	$	2,817	$	(49)	$	2,817	$	(49)
Asset-backed securities	27		148,324		(68)		1,233		(2)		149,557		(70)
Residential mortgage-backed securities	14		13,688		(118)		3,743		(91)		17,431		(209)
Collateralized mortgage obligation securities	1		—		—		424		(1)		424		(1)
Commercial mortgage-backed securities	11		44,203		(658)		66,139		(560)		110,342		(1,218)
Corporate debt securities	1		—		—		6,505		(3,495)		6,505		(3,495)
Total unrealized loss position
investment securities	56	$	206,215	$	(844)	$	80,861	$	(4,198)	$	287,076	$	(5,042)

The table below indicates the length of time individual securities had been in a continuous unrealized loss position at December 31, 2020 (dollars in thousands):

Available-for-sale		Less than 12 months				12 months or longer				Total
	Number of securities		Fair Value		Unrealized losses		Fair Value		Unrealized losses		Fair Value		Unrealized losses
Description of Securities
U.S. Government agency securities	5	$	594	$	(2)	$	5,322	$	(118)	$	5,916	$	(120)
Asset-backed securities	24		123,447		(337)		29,563		(123)		153,010		(460)
Residential mortgage-backed securities	12		6,221		(35)		6,650		(61)		12,871		(96)
Collateralized mortgage obligation securities	6		2,505		(10)		3,489		(1)		5,994		(11)
Commercial mortgage-backed securities	4		69,486		(4,562)		—		—		69,486		(4,562)
Corporate debt securities	2		—		—		31,796		(3,247)		31,796		(3,247)
Total unrealized loss position
investment securities	53	$	202,253	$	(4,946)	$	76,820	$	(3,550)	$	279,073	$	(8,496)