SECURITIES (Tables)

12 Months Ended

Dec. 31, 2022

SECURITIES

Major Categories of Securities Owned by Entity

	December 31, 2022
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
(In thousands)	Cost		Gains		Losses		Value
Securities available-for-sale:
Treasury securities	$	246,899	$	—	$	(19,643)	$	227,256
Corporate securities		183,791		57		(17,075)		166,773
Pass-through mortgage-backed securities ("MBS") issued by government sponsored entities ("GSEs")		272,774		—		(31,534)		241,240
Agency collateralized mortgage obligations ("CMOs")		331,394		2		(50,057)		281,339
State and municipal obligations		37,000		—		(3,021)		33,979
Total securities available-for-sale	$	1,071,858	$	59	$	(121,330)	$	950,587
	December 31, 2022
			Gross		Gross
	Amortized		Unrecognized		Unrecognized		Fair
(In thousands)	Cost		Gains		Losses		Value
Securities held-to-maturity:
Agency notes	$	89,157	$	—	$	(14,095)	$	75,062
Corporate securities		9,000		—		(553)		8,447
Pass-through MBS issued by GSEs		278,281		—		(40,960)		237,321
Agency CMOs		209,360		—		(24,431)		184,929
Total securities held-to-maturity	$	585,798	$	—	$	(80,039)	$	505,759

	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

Amortized cost and fair value of securities are shown by contractual maturity

	December 31, 2022
	Amortized		Fair
(In thousands)	Cost		Value
Available-for-sale
Within one year	$	6,355	$	6,253
One to five years		277,570		255,798
Five to ten years		178,620		161,398
Beyond ten years		5,145		4,559
Pass-through MBS issued by GSEs and agency CMO		604,168		522,579
Total	$	1,071,858	$	950,587
Held-to-maturity
Within one year	$	—	$	—
One to five years		10,000		9,314
Five to ten years		88,157		74,195
Beyond ten years		—		—
Pass-through MBS issued by GSEs and agency CMO		487,641		422,250
Total	$	585,798	$	505,759

Summary of Sale of Available-for-sale Securities

	Year Ended December 31,
(In thousands)	2022		2021		2020
Securities available-for-sale
Proceeds	$	—	$	138,077	$	94,252
Gross gains		—		1,327		4,592
Tax expense on gains		—		421		1,444
Gross losses		—		120		—
Tax benefit on losses		—		38		—

Sales of Marketable Equity Securities

	Year Ended December 31,
(In thousands)	2022		2021		2020
Proceeds:
Marketable equity securities	$	—	$	6,101	$	546

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

	December 31, 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	$	—	$	—	$	227,256	$	19,643	$	227,256	$	19,643
Corporate securities		110,707		8,494		50,116		8,581		160,823		17,075
Pass-through MBS issued by GSEs		50,813		2,010		190,427		29,524		241,240		31,534
Agency CMOs		55,924		3,454		220,413		46,603		276,337		50,057
State and municipal obligations		10,848		174		22,681		2,847		33,529		3,021

	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