Investment Securities (Tables)

9 Months Ended

Sep. 30, 2026

Investments, Debt and Equity Securities [Abstract]

Schedule of Investment in AFS and HTM Securities

The table below summarizes the Company's investment in AFS securities by major security type.

	As of September 30, 2026
(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
U.S. agency securities	$	298,330	$	1	$	(20,301)	$	278,030
Residential mortgage-backed securities	549,831		28		(73,459)		476,400
Commercial mortgage-backed securities	58,543		—		(4,934)		53,609
Municipal bonds	83,289		—		(1,275)		82,014
Corporate bonds	2,000		—		(23)		1,977
Total available-for-sale securities	$	991,993	$	29	$	(99,992)	$	892,030
	As of December 31, 2025
(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
U.S. agency securities	$	355,249	$	—	$	(17,541)	$	337,708
Residential mortgage-backed securities	620,540		152		(58,188)		562,504
Commercial mortgage-backed securities	68,931		117		(2,503)		66,545
Municipal bonds	8,426		—		(380)		8,046
Corporate bonds	2,000		—		(33)		1,967
Total available-for-sale securities	$	1,055,146	$	269	$	(78,645)	$	976,770

The table below summarizes the Company's investment in HTM securities by major security type.

	As of September 30, 2026
(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Residential mortgage-backed securities	$	501,554	$	—	$	(81,959)	$	419,595
Commercial mortgage-backed securities	83,924		—		(13,350)		70,574
Municipal bonds	106,692		—		(13,942)		92,750
Corporate bonds	105,688		17		(4,170)		101,535
Total	797,858		$	17	$	(113,421)	$	684,454
Less: Allowance for credit losses	(409)
Total held-to-maturity securities, net of ACL	$	797,449
	As of December 31, 2025
(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Residential mortgage-backed securities	$	544,402	$	—	$	(58,836)	$	485,566
Commercial mortgage-backed securities	85,760		—		(9,787)		75,973
Municipal bonds	106,875		—		(6,933)		99,942
Corporate bonds	118,773		8		(5,315)		113,466
Total	855,810		$	8	$	(80,871)	$	774,947
Less: Allowance for credit losses	(1,030)
Total held-to-maturity securities, net of ACL	$	854,780

Schedule of Continuous Unrealized Loss on AFS and HTM Securities

The table below summarizes, by length of time, the Company's AFS securities that have been in a continuous unrealized loss position and HTM securities that have been in a continuous unrecognized loss position.

	As of September 30, 2026
		Less than 12 Months				12 Months or Greater				Total
(dollars in thousands)	Number of Securities	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
Investment securities available-for-sale:
U.S. agency securities	42	$	—	$	—	$	276,727	$	(20,301)	$	276,727	$	(20,301)
Residential mortgage-backed securities	142	21,926		(596)		452,981		(72,863)		474,907		(73,459)
Commercial mortgage-backed securities	11	27,130		(1,828)		26,479		(3,106)		53,609		(4,934)
Municipal bonds	2	74,538		(463)		7,476		(812)		82,014		(1,275)
Corporate bonds	1	—		—		1,977		(23)		1,977		(23)
Total	198	$	123,594	$	(2,887)	$	765,640	$	(97,105)	$	889,234	$	(99,992)
Investment securities held-to-maturity:
Residential mortgage-backed securities	130	$	—	$	—	$	419,595	$	(81,959)	$	419,595	$	(81,959)
Commercial mortgage-backed securities	16	—		—		70,574		(13,350)		70,574		(13,350)
Municipal bonds	34	991		(9)		91,759		(13,933)		92,750		(13,942)
Corporate bonds	23	12,346		(70)		84,757		(4,100)		97,103		(4,170)
Total	203	$	13,337	$	(79)	$	666,685	$	(113,342)	$	680,022	$	(113,421)

	As of December 31, 2025
		Less than 12 Months				12 Months or Greater				Total
(dollars in thousands)	Number of Securities	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
Investment securities available-for-sale:
U.S. agency securities	52	$	—	$	—	$	337,708	$	(17,541)	$	337,708	$	(17,541)
Residential mortgage-backed securities	139	—		—		546,514		(58,188)		546,514		(58,188)
Commercial mortgage-backed securities	10	—		—		37,329		(2,503)		37,329		(2,503)
Municipal bonds	1	—		—		8,046		(380)		8,046		(380)
Corporate bonds	1	—		—		1,967		(33)		1,967		(33)
Total	203	$	—	$	—	$	931,564	$	(78,645)	$	931,564	$	(78,645)
Investment securities held-to-maturity:
Residential mortgage-backed securities	136	$	—	$	—	$	485,567	$	(58,836)	$	485,567	$	(58,836)
Commercial mortgage-backed securities	16	4,271		(503)		71,702		(9,284)		75,973		(9,787)
Municipal bonds	33	—		—		98,942		(6,933)		98,942		(6,933)
Corporate bonds	27	1,922		(18)		106,638		(5,297)		108,560		(5,315)
Total	212	$	6,193	$	(521)	$	762,849	$	(80,350)	$	769,042	$	(80,871)

Schedule of Investment in AFS Securities and HTM Securities by Contractual Maturity

The table below summarizes the Company's investment in AFS securities and HTM securities by contractual maturity. Expected maturities for mortgage-backed securities ("MBS") will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

	As of September 30, 2026
(dollars in thousands)	Amortized Cost		Estimated Fair Value
Investment securities available-for-sale:
Within one year	$	53,179	$	52,464
One to five years	295,611		278,894
Five to ten years	17,143		15,793
Beyond ten years	17,686		14,870
Residential mortgage-backed securities	549,831		476,400
Commercial mortgage-backed securities	58,543		53,609
Less: allowance for credit losses	—		—
Total investment securities available-for-sale	991,993		892,030
Investment securities held-to-maturity:
Within one year	26,080		25,856
One to five years	59,778		56,555
Five to ten years	76,456		69,691
Beyond ten years	50,066		42,183
Residential mortgage-backed securities:	501,554		419,595
Commercial mortgage-backed securities	83,924		70,574
Less: allowance for credit losses	(409)		—
Total investment securities held-to-maturity	797,449		684,454
Total	$	1,789,442	$	1,576,484

Schedule of Information About the Sales and Calls of Investment Securities

The table below displays information about the sales and calls of our investment securities.

	Three Months Ended September 30,				For the Nine Months Ended September 30,
(dollars in thousands)	2026		2025		2026		2025
Proceeds from sales and calls	$	1,556	$	84,157	$	13,668	$	197,117
Gross realized gains from sales and calls	63		3		332		12
Gross realized losses from sales and calls	42		1,985		42		3,844