SECURITIES (Tables)

12 Months Ended

Dec. 31, 2023

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities

The amortized cost and fair value of securities available for sale were as follows:

	December 31, 2023
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(In thousands)
Available for Sale
U.S. government and agency securities	$	307,529	$	90	$	(10,201)	$	297,418
Municipal securities	229,615		1,615		(27,171)		204,059
Agency mortgage-backed pass-through securities	424,664		370		(37,161)		387,873
Agency collateralized mortgage obligations	462,498		172		(64,553)		398,117
Corporate bonds and other	120,824		56		(12,667)		108,213
Total	$	1,545,130	$	2,303	$	(151,753)	$	1,395,680

	December 31, 2022
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(In thousands)
Available for Sale
U.S. government and agency securities	$	433,417	$	90	$	(19,227)	$	414,280
Municipal securities	580,076		4,319		(43,826)		540,569
Agency mortgage-backed pass-through securities	370,471		362		(42,032)		328,801
Agency collateralized mortgage obligations	461,760		—		(67,630)		394,130
Corporate bonds and other	143,192		2		(13,388)		129,806
Total	$	1,988,916	$	4,773	$	(186,103)	$	1,807,586

Investments Classified by Contractual Maturity Date

The amortized cost and fair value of investment securities at December 31, 2023, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities if borrowers have the right to call or prepay obligations at any time with or without call or prepayment penalties.

	Amortized Cost		Fair Value
	(In thousands)
Due in one year or less	$	86,009	$	83,404
Due after one year through five years	82,999		78,246
Due after five years through ten years	137,545		123,650
Due after ten years	351,415		324,390
Subtotal	657,968		609,690
Agency mortgage-backed pass through securities and collateralized mortgage obligations	887,162		785,990
Total	$	1,545,130	$	1,395,680

Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value

Securities with unrealized losses segregated by length of time such securities have been in a continuous loss position are as follows:

	December 31, 2023
	Less than 12 Months				More than 12 Months				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
	(In thousands)
Available for Sale
U.S. government and agency securities	$	110,038	$	(2,208)	$	154,145	$	(7,993)	$	264,183	$	(10,201)
Municipal securities	1,303		(14)		177,957		(27,157)		179,260		(27,171)
Agency mortgage-backed pass-through securities	80,208		(1,444)		257,779		(35,717)		337,987		(37,161)
Agency collateralized mortgage obligations	23,051		(621)		348,854		(63,932)		371,905		(64,553)
Corporate bonds and other	11,279		(1,452)		85,285		(11,215)		96,564		(12,667)
Total	$	225,879	$	(5,739)	$	1,024,020	$	(146,014)	$	1,249,899	$	(151,753)

	December 31, 2022
	Less than 12 Months				More than 12 Months				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
	(In thousands)
Available for Sale
U.S. government and agency securities	$	99,732	$	(1,427)	$	305,256	$	(17,800)	$	404,988	$	(19,227)
Municipal securities	228,192		(14,473)		134,640		(29,353)		362,832		(43,826)
Agency mortgage-backed pass-through securities	95,291		(7,612)		199,836		(34,420)		295,127		(42,032)
Agency collateralized mortgage obligations	117,147		(14,426)		276,925		(53,204)		394,072		(67,630)
Corporate bonds and other	72,913		(5,704)		49,893		(7,684)		122,806		(13,388)
Total	$	613,275	$	(43,642)	$	966,550	$	(142,461)	$	1,579,825	$	(186,103)