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Investment Securities (Tables)

9 Months Ended

Sep. 30, 2025

Investments, Debt and Equity Securities [Abstract]

Schedule of available-for-sale securities reconciliation

The following tables present amortized cost, gross unrealized gains and losses, and fair values of AFS securities as of the dates indicated:

			September 30, 2025
									Allowance												Gross						Gross
			Amortized						for Credit						Net Carrying						Unrealized						Unrealized						Fair
Security Type			Cost						Losses						Amount						Gains						Losses						Value
			(In thousands)
Agency residential MBS			$	991,290					$	—					$	991,290					$	—					$	(147,135)					$	844,155
Agency commercial MBS			52,012						—						52,012						51						(1,181)						50,882
Agency residential CMOs			794,497						—						794,497						3,756						(16,271)						781,982
Corporate debt securities			276,498						(775)						275,723						640						(19,415)						256,948
Private label residential CMOs			286,280						—						286,280						526						(28,113)						258,693
Collateralized loan obligations			205,993						—						205,993						553						(72)						206,474
Private label commercial MBS			10,681						—						10,681						—						(407)						10,274
Asset-backed securities			13,875						—						13,875						7						—						13,882
SBA securities			3,635						—						3,635						—						(191)						3,444
Total (1)			$	2,634,761					$	(775)					$	2,633,986					$	5,533					$	(212,785)					$	2,426,734

_________________________

(1)    Excludes accrued interest receivable of $12.2 million at September 30, 2025 which is recorded in "Other assets" on the condensed consolidated balance sheets.

			December 31, 2024
																					Gross						Gross
			Amortized																		Unrealized						Unrealized						Fair
Security Type			Cost																		Gains						Losses						Value
			(In thousands)
Agency residential MBS			$	1,051,601																	$	—					$	(189,761)					$	861,840
Agency commercial MBS			52,610																		—						(1,046)						51,564
Agency residential CMOs			467,319																		223						(20,911)						446,631
Municipal securities			602																		—						(8)						594
Corporate debt securities			289,098																		—						(31,386)						257,712
Private label residential CMOs			352,615																		7						(35,712)						316,910
Collateralized loan obligations			278,976																		469						(29)						279,416
Private label commercial MBS			13,585																		—						(1,213)						12,372
Asset-backed securities			15,674																		—						(74)						15,600
SBA securities			4,564																		—						(364)						4,200
Total (1)			$	2,526,644																	$	699					$	(280,504)					$	2,246,839

_________________________

(1)    Excludes accrued interest receivable of $12.6 million at December 31, 2024 which is recorded in "Other assets" on the condensed consolidated balance sheets.

Schedule of Realized Gain (Loss)

The following table presents the amortized cost of AFS securities sold with related gross realized gains, gross realized losses, and net realized (losses) gains for the periods indicated:

			Three Months Ended												Nine Months Ended
			September 30,												September 30,
			2025						2024						2025						2024
			(In thousands)
Amortized cost of securities sold			$	—					$	741,834					$	—					$	741,834
Gross realized losses			—						(59,946)						—						(59,946)

Unrealized losses on investment securities available-for-sale

The following tables present the gross unrealized losses and fair values of AFS securities that were in unrealized loss positions as of the dates indicated:

			September 30, 2025
			Less Than 12 Months												12 Months or More												Total
									Gross												Gross												Gross
			Fair						Unrealized						Fair						Unrealized						Fair						Unrealized
Security Type			Value						Losses						Value						Losses						Value						Losses
			(In thousands)
Agency residential MBS			$	—					$	—					$	844,155					$	(147,135)					$	844,155					$	(147,135)
Agency commercial MBS			4,997						(3)						31,993						(1,178)						36,990						(1,181)
Agency residential CMOs			53,802						(181)						102,342						(16,090)						156,144						(16,271)
Corporate debt securities			3,747						(3)						230,586						(19,412)						234,333						(19,415)
Private label residential CMOs			—						—						127,824						(28,113)						127,824						(28,113)
Collateralized loan obligations			28,765						(72)						—						—						28,765						(72)
Private label commercial MBS			—						—						10,274						(407)						10,274						(407)
SBA securities			—						—						3,444						(191)						3,444						(191)
Total			$	91,311					$	(259)					$	1,350,618					$	(212,526)					$	1,441,929					$	(212,785)

			December 31, 2024
			Less Than 12 Months												12 Months or More												Total
									Gross												Gross												Gross
			Fair						Unrealized						Fair						Unrealized						Fair						Unrealized
Security Type			Value						Losses						Value						Losses						Value						Losses
			(In thousands)
Agency residential MBS			$	—					$	—					$	861,840					$	(189,761)					$	861,840					$	(189,761)
Agency commercial MBS			40,291						(87)						11,273						(959)						51,564						(1,046)
Agency residential CMOs			273,347						(1,994)						104,757						(18,917)						378,104						(20,911)
Municipal securities			—						—						594						(8)						594						(8)
Corporate debt securities			15,968						(32)						241,744						(31,354)						257,712						(31,386)
Private label residential CMOs			180,915						(1,031)						129,178						(34,681)						310,093						(35,712)
Collateralized loan obligations			38,771						(29)						—						—						38,771						(29)
Private label commercial MBS			—						—						12,372						(1,213)						12,372						(1,213)
Asset-backed securities			15,600						(74)						—						—						15,600						(74)
SBA securities			—						—						4,200						(364)						4,200						(364)
Total			$	564,892					$	(3,247)					$	1,365,958					$	(277,257)					$	1,930,850					$	(280,504)

Available-for-sale Investments Classified by Contractual Maturity Date

The following tables present the contractual maturities of our AFS securities portfolio based on amortized cost and fair value as of the dates indicated:

			September 30, 2025
									Due After						Due After
			Due						One Year						Five Years						Due
			Within						Through						Through						After
Security Type			One Year						Five Years						Ten Years						Ten Years						Total
			(In thousands)
Amortized Cost:
Agency residential MBS			$	—					$	—					$	—					$	991,290					$	991,290
Agency commercial MBS			—						40,100						—						11,912						52,012
Agency residential CMOs			—						—						14,093						780,404						794,497
Corporate debt securities			6,750						32,215						237,533						—						276,498
Private label residential CMOs			—						—						—						286,280						286,280
Collateralized loan obligations			—						5,674						93,763						106,556						205,993
Private label commercial MBS			—						—						472						10,209						10,681
Asset-backed securities			—						—						—						13,875						13,875
SBA securities			—						—						3,635						—						3,635
Total			$	6,750					$	77,989					$	349,496					$	2,200,526					$	2,634,761

			September 30, 2025
									Due After						Due After
			Due						One Year						Five Years						Due
			Within						Through						Through						After
Security Type			One Year						Five Years						Ten Years						Ten Years						Total
			(In thousands)
Fair Value:
Agency residential MBS			$	—					$	—					$	—					$	844,155					$	844,155
Agency commercial MBS			—						40,134						—						10,748						50,882
Agency residential CMOs			—						—						14,271						767,711						781,982
Corporate debt securities			6,750						31,655						218,543						—						256,948
Private label residential CMOs			—						—						—						258,693						258,693
Collateralized loan obligations			—						5,677						93,794						107,003						206,474
Private label commercial MBS			—						—						466						9,808						10,274
Asset-backed securities			—						—						—						13,882						13,882
SBA securities			—						—						3,444						—						3,444
Total			$	6,750					$	77,466					$	330,518					$	2,012,000					$	2,426,734

Schedule of held-to-maturity securities reconciliation

The following tables present amortized cost, allowance for credit losses, gross unrealized gains and losses, and fair values of HTM securities as of the dates indicated:

			September 30, 2025
									Allowance
									for						Net						Gross						Gross
			Amortized						Credit						Carrying						Unrealized						Unrealized						Fair
Security Type			Cost						Losses						Amount						Gains						Losses						Value
			(In thousands)
Municipal securities			$	1,236,645					$	(20)					$	1,236,625					$	1,285					$	(33,921)					$	1,203,989
Agency commercial MBS			445,605						—						445,605						—						(20,778)						424,827
Private label commercial MBS			359,091						—						359,091						—						(10,467)						348,624
U.S. Treasury securities			192,255						—						192,255						—						(8,719)						183,536
Corporate debt securities			70,756						(675)						70,081						—						(7,435)						62,646
Total (1)			$	2,304,352					$	(695)					$	2,303,657					$	1,285					$	(81,320)					$	2,223,622

__________________________

(1)    Excludes accrued interest receivable of $11.2 million at September 30, 2025 which is recorded in "Other assets" on the condensed consolidated balance sheets.

			December 31, 2024
									Allowance
									for						Net						Gross						Gross
			Amortized						Credit						Carrying						Unrealized						Unrealized						Fair
Security Type			Cost						Losses						Amount						Gains						Losses						Value
			(In thousands)
Municipal securities			$	1,251,364					$	(140)					$	1,251,224					$	35					$	(54,799)					$	1,196,460
Agency commercial MBS			440,476						—						440,476						—						(37,840)						402,636
Private label commercial MBS			355,342						—						355,342						—						(26,226)						329,116
U.S. Treasury securities			189,985						—						189,985						—						(16,702)						173,283
Corporate debt securities			70,482						(1,360)						69,122						—						(13,923)						55,199
Total (1)			$	2,307,649					$	(1,500)					$	2,306,149					$	35					$	(149,490)					$	2,156,694

__________________________

(1)    Excludes accrued interest receivable of $13.4 million at December 31, 2024 which is recorded in "Other assets" on the condensed consolidated balance sheets.

Debt Securities, Held-to-maturity, Credit Quality Indicator

The following tables present our HTM securities portfolio at amortized cost by the lowest available credit rating as of the dates indicated:

			September 30, 2025
Security Type			AAA						AA+						AA						AA-																								BBB						NR						Total
			(In thousands)
Amortized Cost:
Municipal securities			$	566,931					$	363,584					$	220,246					$	84,175																							$	1,709					$	—					$	1,236,645
Agency commercial MBS			—						445,605						—						—																								—						—						445,605
Private label commercial MBS			359,091						—						—						—																								—						—						359,091
U.S. Treasury securities			—						192,255						—						—																								—						—						192,255
Corporate debt securities			—						—						—						—																								44,609						26,147						70,756
Total			$	926,022					$	1,001,444					$	220,246					$	84,175																							$	46,318					$	26,147					$	2,304,352

			December 31, 2024
Security Type			AAA						AA+						AA						AA-												A												BBB						NR						Total
			(In thousands)
Amortized Cost:
Municipal securities			$	571,347					$	369,072					$	218,581					$	72,952											$	1,667											$	—					$	17,745					$	1,251,364
Agency commercial MBS			—						440,476						—						—												—												—						—						440,476
Private label commercial MBS			355,342						—						—						—												—												—						—						355,342
U.S. Treasury securities			—						189,985						—						—												—												—						—						189,985
Corporate debt securities			—						—						—						—												—												44,507						25,975						70,482
Total			$	926,689					$	999,533					$	218,581					$	72,952											$	1,667											$	44,507					$	43,720					$	2,307,649

Held-to-Maturity Investments Classified by Contractual Maturity Date

The following tables present the contractual maturities of our HTM securities portfolio based on amortized cost and fair value as of the date indicated:

			September 30, 2025
									Due After						Due After
			Due						One Year						Five Years						Due
			Within						Through						Through						After
Security Type			One Year						Five Years						Ten Years						Ten Years						Total
			(In thousands)
Amortized Cost:
Municipal securities			$	—					$	104,005					$	411,923					$	720,717					$	1,236,645
Agency commercial MBS			—						68,991						376,614						—						445,605
Private label commercial MBS			—						—						37,186						321,905						359,091
U.S. Treasury securities			—						—						192,255						—						192,255
Corporate debt securities			—						—						44,811						25,945						70,756
Total			$	—					$	172,996					$	1,062,789					$	1,068,567					$	2,304,352

			September 30, 2025
									Due After						Due After
			Due						One Year						Five Years						Due
			Within						Through						Through						After
Security Type			One Year						Five Years						Ten Years						Ten Years						Total
			(In thousands)
Fair Value:
Municipal securities			$	—					$	103,176					$	406,416					$	694,397					$	1,203,989
Agency commercial MBS			—						66,670						358,157						—						424,827
Private label commercial MBS			—						—						36,229						312,395						348,624
U.S. Treasury securities			—						—						183,536						—						183,536
Corporate debt securities			—						—						41,321						21,325						62,646
Total			$	—					$	169,846					$	1,025,659					$	1,028,117					$	2,223,622

Investment income

The following table presents the composition of our interest income on investment securities for the periods indicated:

			Three Months Ended												Nine Months Ended
			September 30,												September 30,
			2025						2024						2025						2024
			(In thousands)
Taxable interest			$	31,608					$	28,576					$	93,821					$	83,241
Non-taxable interest			4,400						4,622						13,464						14,088
Dividend income			2,283						1,714						6,484						5,722
Total interest income on investment securities			$	38,291					$	34,912					$	113,769					$	103,051

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Available-for-sale Investments Classified by Contractual Maturity Date

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Tabular disclosure of fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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