SECURITIES (Tables)

9 Months Ended

Sep. 30, 2022

SECURITIES [Abstract]

Major Categories of Securities Owned by Entity

	September 30, 2022
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
(In thousands)	Cost		Gains		Losses		Value
Securities available-for-sale:
Treasury securities	$	247,157	$	—	$	(21,232)	$	225,925
Corporate securities		174,344		—		(17,312)		157,032
Pass-through mortgage-backed securities ("MBS") issued by government sponsored entities ("GSEs")		287,157		—		(34,502)		252,655
Agency collateralized mortgage obligations ("CMOs")		342,734		2		(49,019)		293,717
State and municipal obligations		37,157		—		(3,559)		33,598
Total securities available-for-sale	$	1,088,549	$	2	$	(125,624)	$	962,927
	September 30, 2022
			Gross		Gross
	Amortized		Unrecognized		Unrecognized		Fair
(In thousands)	Cost		Gains		Losses		Value
Securities held-to-maturity:
Agency notes	$	89,057	$	—	$	(14,168)	$	74,889
Corporate securities		9,000		—		(287)		8,713
Pass-through MBS issued by GSEs		281,739		—		(43,405)		238,334
Agency CMOs		211,607		—		(22,489)		189,118
Total securities held-to-maturity	$	591,403	$	—	$	(80,349)	$	511,054

	December 31, 2021
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
(In thousands)	Cost		Gains		Losses		Value
Securities available-for-sale:
Agency notes	$	82,476	$	—	$	(2,222)	$	80,254
Treasury securities		247,916		—		(3,147)		244,769
Corporate securities		148,430		4,354		(754)		152,030
Pass-through MBS issued by GSEs		528,749		4,271		(6,566)		526,454
Agency CMOs		527,348		2,705		(8,795)		521,258
State and municipal obligations		39,175		73		(302)		38,946
Total securities available-for-sale	$	1,574,094	$	11,403	$	(21,786)	$	1,563,711
	December 31, 2021
			Gross		Gross
	Amortized		Unrecognized		Unrecognized		Fair
(In thousands)	Cost		Gains		Losses		Value
Securities held-to-maturity:
Pass-through MBS issued by GSEs	$	118,382	$	59	$	(1,141)	$	117,300
Agency CMOs		60,927		—		(873)		60,054
Total securities held-to-maturity	$	179,309	$	59	$	(2,014)	$	177,354

Schedule of amortized cost and fair value of debt securities

	September 30, 2022
	Amortized		Fair
(In thousands)	Cost		Value
Available-for-sale
Within one year	$	4,328	$	4,260
One to five years		279,979		256,086
Five to ten years		169,206		151,713
Beyond ten years		5,145		4,496
Pass-through MBS issued by GSEs and agency CMO		629,891		546,372
Total	$	1,088,549	$	962,927
Held-to-maturity
Within one year	$	—	$	—
One to five years		10,000		9,301
Five to ten years		88,057		74,301
Beyond ten years		—		—
Pass-through MBS issued by GSEs and agency CMO		493,346		427,452
Total	$	591,403	$	511,054

Summary of Sale of Available-for-sale Securities

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(In thousands)	2022		2021		2022		2021
Securities available-for-sale
Proceeds	$	—	$	—	$	—	$	138,077
Gross gains		—		—		—		1,327
Tax expense on gains		—		—		—		421
Gross losses		—		—		—		120
Tax benefit on losses		—		—		—		38

Sales of Marketable Equity Securities

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(In thousands)	2022		2021		2022		2021
Proceeds:
Marketable equity securities	$	—	$	—	$	—	$	6,101

Gross Unrealized Losses and Fair Value of Investment Securities by Investment Category and Length of Time in a Continuous Unrealized Loss Position

	September 30, 2022
	Less than 12				12 Consecutive
	Consecutive Months				Months or Longer				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(In thousands)	Value		Losses		Value		Losses		Value		Losses
Securities available-for-sale:
Treasury securities	$	—	$	—	$	225,925	$	21,232	$	225,925	$	21,232
Corporate securities		135,613		13,125		21,419		4,187		157,032		17,312
Pass-through MBS issued by GSEs		69,094		4,440		183,561		30,062		252,655		34,502
Agency CMOs		80,929		5,456		207,788		43,563		288,717		49,019
State and municipal obligations		18,428		1,498		15,170		2,061		33,598		3,559

	December 31, 2021
	Less than 12				12 Consecutive
	Consecutive Months				Months or Longer				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(In thousands)	Value		Losses		Value		Losses		Value		Losses
Securities available-for-sale:
Agency notes	$	58,607	$	1,369	$	21,647	$	853	$	80,254	$	2,222
Treasury securities		244,769		3,147		—		—		244,769		3,147
Corporate securities		37,620		754		—		—		37,620		754
Pass-through MBS issued by GSEs		422,634		6,333		4,748		233		427,382		6,566
Agency CMOs		349,879		8,672		3,182		123		353,061		8,795
State and municipal obligations		18,887		302		—		—		18,887		302