SECURITIES (Tables)

6 Months Ended

Jun. 30, 2022

SECURITIES [Abstract]

Major Categories of Securities Owned by Entity

	June 30, 2022
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
(In thousands)	Cost		Gains		Losses		Value
Securities available-for-sale:
Treasury securities	$	247,412	$	—	$	(15,532)	$	231,880
Corporate securities		151,335		—		(10,139)		141,196
Pass-through mortgage-backed securities ("MBS") issued by government sponsored entities ("GSEs")		299,686		3		(22,047)		277,642
Agency collateralized mortgage obligations ("CMOs")		357,546		—		(35,665)		321,881
State and municipal obligations		37,707		—		(2,549)		35,158
Total securities available-for-sale	$	1,093,686	$	3	$	(85,932)	$	1,007,757
	June 30, 2022
			Gross		Gross
	Amortized		Unrecognized		Unrecognized		Fair
(In thousands)	Cost		Gains		Losses		Value
Securities held-to-maturity:
Agency notes	$	88,957	$	—	$	(9,201)	$	79,756
Corporate securities		5,000		—		—		5,000
Pass-through MBS issued by GSEs		287,959		—		(26,529)		261,430
Agency CMOs		198,049		328		(12,693)		185,684
Total securities held-to-maturity	$	579,965	$	328	$	(48,423)	$	531,870

	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

	June 30, 2022
	Amortized		Fair
(In thousands)	Cost		Value
Available-for-sale
Within one year	$	3,904	$	3,851
One to five years		276,581		259,282
Five to ten years		150,824		140,475
Beyond ten years		5,145		4,626
Pass-through MBS issued by GSEs and agency CMO		657,232		599,523
Total	$	1,093,686	$	1,007,757
Held-to-maturity
Within one year	$	—	$	—
One to five years		10,000		9,622
Five to ten years		78,957		70,134
Beyond ten years		5,000		5,000
Pass-through MBS issued by GSEs and agency CMO		486,008		447,114
Total	$	579,965	$	531,870

Summary of Sale of Available-for-sale Securities

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In thousands)	2022		2021		2022		2021
Securities available-for-sale
Proceeds	$	—	$	3,519	$	—	$	138,077
Gross gains		—		20		—		1,327
Tax expense on gains		—		7		—		421
Gross losses		—		—		—		120
Tax benefit on losses		—		—		—		38

Sales of Marketable Equity Securities

	Three Months Ended				Six Months Ended
	June 30,				June 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

	June 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	$	231,880	$	15,532	$	—	$	—	$	231,880	$	15,532
Corporate securities		138,286		10,049		2,910		90		141,196		10,139
Pass-through MBS issued by GSEs		241,079		16,964		32,676		5,083		273,755		22,047
Agency CMOs		212,774		16,090		108,938		19,575		321,712		35,665
State and municipal obligations		28,021		1,728		6,447		821		34,468		2,549

	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