Securities (Tables)

6 Months Ended

Jun. 30, 2025

Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]

Amortized Cost and Fair Value of Debt Securities Available for Sale

	June 30, 2025								December 31, 2024
			Gross		Gross						Gross		Gross
Securities Available for Sale	Amortized		Unrealized		Unrealized		Fair		Amortized		Unrealized		Unrealized		Fair
($ in thousands)	Cost		Gains		Losses		Value		Cost		Gains		Losses		Value
U.S. Treasury and government agency securities	$	270,722	$	2,668	$	1,757	$	271,633	$	185,827	$	349	$	3,894	$	182,282
Municipal obligations		196,524		13		2,283		194,254		200,272		—		3,942		196,330
Residential mortgage-backed securities		2,566,235		6,090		300,259		2,272,066		2,482,109		496		353,554		2,129,051
Commercial mortgage-backed securities		3,019,759		11,858		179,361		2,852,256		2,849,372		2,185		250,592		2,600,965
Collateralized mortgage obligations		31,718		—		1,565		30,153		37,553		—		2,306		35,247
Corporate debt securities		17,500		—		1,186		16,314		19,000		—		1,384		17,616
Total	$	6,102,458	$	20,629	$	486,411	$	5,636,676	$	5,774,133	$	3,030	$	615,672	$	5,161,491

Amortized Cost and Fair Value of Debt Securities Held to Maturity

	June 30, 2025								December 31, 2024
			Gross		Gross						Gross		Gross
Securities Held to Maturity	Amortized		Unrealized		Unrealized		Fair		Amortized		Unrealized		Unrealized		Fair
($ in thousands)	Cost		Gains		Losses		Value		Cost		Gains		Losses		Value
U.S. Treasury and government agency securities	$	383,892	$	160	$	34,943	$	349,109	$	394,689	$	—	$	45,876	$	348,813
Municipal obligations		549,495		169		15,089		534,575		623,907		169		20,867		603,209
Residential mortgage-backed securities		534,652		—		42,703		491,949		573,057		—		61,525		511,532
Commercial mortgage-backed securities		741,086		—		55,032		686,054		818,604		—		72,854		745,750
Collateralized mortgage obligations		22,210		—		825		21,385		25,406		—		1,184		24,222
Total	$	2,231,335	$	329	$	148,592	$	2,083,072	$	2,435,663	$	169	$	202,306	$	2,233,526

Available for Sale Securities [Member]

Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]

Amortized Cost and Fair Value of Debt Securities by Contractual Maturity

Debt Securities Available for Sale	Amortized		Fair
($ in thousands)	Cost		Value
Due in one year or less	$	31,178	$	31,224
Due after one year through five years		1,263,829		1,241,150
Due after five years through ten years		2,194,300		2,038,471
Due after ten years		2,613,151		2,325,831
Total debt securities available for sale	$	6,102,458	$	5,636,676

Securities with Unrealized Losses

The fair value and gross unrealized losses for securities classified as available for sale with unrealized losses for the periods indicated follow.

	June 30, 2025
Available for Sale	Losses < 12 months				Losses 12 months or >				Total
($ in thousands)	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
U.S. Treasury and government agency securities	$	35,206	$	349	$	7,150	$	1,408	$	42,356	$	1,757
Municipal obligations		17,927		37		168,200		2,246		186,127		2,283
Residential mortgage-backed securities		85,738		374		1,501,807		299,885		1,587,545		300,259
Commercial mortgage-backed securities		22,229		219		2,222,358		179,142		2,244,587		179,361
Collateralized mortgage obligations		—		—		30,153		1,565		30,153		1,565
Corporate debt securities		1,991		9		14,323		1,177		16,314		1,186
Total	$	163,091	$	988	$	3,943,991	$	485,423	$	4,107,082	$	486,411

	December 31, 2024
Available for Sale	Losses < 12 Months				Losses 12 Months or >				Total
($ in thousands)	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
U.S. Treasury and government agency securities	$	130,453	$	2,243	$	7,247	$	1,651	$	137,700	$	3,894
Municipal obligations		24,149		247		170,110		3,695		194,259		3,942
Residential mortgage-backed securities		347,772		2,935		1,554,001		350,619		1,901,773		353,554
Commercial mortgage-backed securities		184,534		2,738		2,139,191		247,854		2,323,725		250,592
Collateralized mortgage obligations		—		—		35,247		2,306		35,247		2,306
Corporate debt securities		—		—		15,616		1,384		15,616		1,384
Total	$	686,908	$	8,163	$	3,921,412	$	607,509	$	4,608,320	$	615,672

Held-to-maturity Securities [Member]

Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]

Amortized Cost and Fair Value of Debt Securities by Contractual Maturity

Debt Securities Held to Maturity	Amortized		Fair
($ in thousands)	Cost		Value
Due in one year or less	$	53,755	$	53,621
Due after one year through five years		753,558		727,480
Due after five years through ten years		501,491		475,343
Due after ten years		922,531		826,628
Total debt securities held to maturity	$	2,231,335	$	2,083,072

Securities with Unrealized Losses

The fair value and gross unrealized losses for securities classified as held to maturity with unrealized losses for the periods indicated follow.

	June 30, 2025
Held to Maturity	Losses < 12 Months				Losses 12 Months or >				Total
($ in thousands)	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
U.S. Treasury and government agency securities	$	8,823	$	86	$	321,522	$	34,857	$	330,345	$	34,943
Municipal obligations		76,330		105		432,533		14,984		508,863		15,089
Residential mortgage-backed securities		—		—		491,949		42,703		491,949		42,703
Commercial mortgage-backed securities		—		—		686,054		55,032		686,054		55,032
Collateralized mortgage obligations		—		—		21,385		825		21,385		825
Total	$	85,153	$	191	$	1,953,443	$	148,401	$	2,038,596	$	148,592

	December 31, 2024
Held to Maturity	Losses < 12 Months				Losses 12 Months or >				Total
($ in thousands)	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
U.S. Treasury and government agency securities	$	27,660	$	840	$	321,154	$	45,036	$	348,814	$	45,876
Municipal obligations		82,028		451		497,999		20,416		580,027		20,867
Residential mortgage-backed securities		—		—		511,531		61,525		511,531		61,525
Commercial mortgage-backed securities		—		—		745,750		72,854		745,750		72,854
Collateralized mortgage obligations		—		—		24,222		1,184		24,222		1,184
Total	$	109,688	$	1,291	$	2,100,656	$	201,015	$	2,210,344	$	202,306