Investment Securities - Securities Available for Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 2,646,414	$ 2,526,644
Debt Securities, Available-for-Sale, Allowance for Credit Loss	(775)	0
Debt Securities, Available-for-Sale, Net Carrying Amount	2,645,639
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	5,309	699
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(196,890)	(280,504)
(amortized cost of $2,646,414 and $2,526,644, respectively)(ACL of $775 and $—, respectively)	2,454,058	2,246,839
Interest Receivable	11,400	12,600
Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	972,161	1,051,601
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0
Debt Securities, Available-for-Sale, Net Carrying Amount	972,161
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(138,076)	(189,761)
(amortized cost of $2,646,414 and $2,526,644, respectively)(ACL of $775 and $—, respectively)	834,085	861,840
Government agency and government-sponsored enterprise pass through securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	52,022	52,610
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0
Debt Securities, Available-for-Sale, Net Carrying Amount	52,022
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	44	0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(1,100)	(1,046)
(amortized cost of $2,646,414 and $2,526,644, respectively)(ACL of $775 and $—, respectively)	50,966	51,564
Government agency and government-sponsored enterprise collateralized mortgage obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	883,067	467,319
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0
Debt Securities, Available-for-Sale, Net Carrying Amount	883,067
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	3,857	223
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(15,300)	(20,911)
(amortized cost of $2,646,414 and $2,526,644, respectively)(ACL of $775 and $—, respectively)	871,624	446,631
US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis		602
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax		0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		(8)
(amortized cost of $2,646,414 and $2,526,644, respectively)(ACL of $775 and $—, respectively)		594
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	257,236	289,098
Debt Securities, Available-for-Sale, Allowance for Credit Loss	(775)
Debt Securities, Available-for-Sale, Net Carrying Amount	256,461
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	576	0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(15,441)	(31,386)
(amortized cost of $2,646,414 and $2,526,644, respectively)(ACL of $775 and $—, respectively)	241,596	257,712
Private Label Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	254,787	352,615
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0
Debt Securities, Available-for-Sale, Net Carrying Amount	254,787
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	522	7
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(26,334)	(35,712)
(amortized cost of $2,646,414 and $2,526,644, respectively)(ACL of $775 and $—, respectively)	228,975	316,910
Collateralized Loan Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	200,519	278,976
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0
Debt Securities, Available-for-Sale, Net Carrying Amount	200,519
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	303	469
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	0	(29)
(amortized cost of $2,646,414 and $2,526,644, respectively)(ACL of $775 and $—, respectively)	200,822	279,416
Mortgage-backed Securities, Issued by Private Enterprises
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	9,746	13,585
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0
Debt Securities, Available-for-Sale, Net Carrying Amount	9,746
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(467)	(1,213)
(amortized cost of $2,646,414 and $2,526,644, respectively)(ACL of $775 and $—, respectively)	9,279	12,372
Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	13,242	15,674
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0
Debt Securities, Available-for-Sale, Net Carrying Amount	13,242
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	7	0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	0	(74)
(amortized cost of $2,646,414 and $2,526,644, respectively)(ACL of $775 and $—, respectively)	13,249	15,600
SBA asset-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	3,634	4,564
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0
Debt Securities, Available-for-Sale, Net Carrying Amount	3,634
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(172)	(364)
(amortized cost of $2,646,414 and $2,526,644, respectively)(ACL of $775 and $—, respectively)	3,462	4,200
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Interest Receivable	$ 13,400	$ 13,400