Investment Securities - Securities Available for Sale (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 2,526,644,000	$ 2,699,255,000
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0	(199,000)
Debt Securities, Available-for-Sale, Net Carrying Amount	2,526,644,000	2,699,056,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	699,000	262,000
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(280,504,000)	(352,454,000)
(amortized cost of $2,526,644 and $2,699,255, respectively)	2,246,839,000	2,346,864,000
Interest Receivable	12,600,000	10,000,000.0
Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	1,051,601,000	1,388,801,000
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-Sale, Net Carrying Amount	1,051,601,000	1,388,801,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(189,761,000)	(201,192,000)
(amortized cost of $2,526,644 and $2,699,255, respectively)	861,840,000	1,187,609,000
US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis		4,965,000
Debt Securities, Available-for-Sale, Allowance for Credit Loss		0
Debt Securities, Available-for-Sale, Net Carrying Amount		4,965,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax		3,000
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		0
(amortized cost of $2,526,644 and $2,699,255, respectively)		4,968,000
Government agency and government-sponsored enterprise pass through securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	52,610,000	268,639,000
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-Sale, Net Carrying Amount	52,610,000	268,639,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(1,046,000)	(15,333,000)
(amortized cost of $2,526,644 and $2,699,255, respectively)	51,564,000	253,306,000
Government agency and government-sponsored enterprise collateralized mortgage obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	467,319,000	320,984,000
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-Sale, Net Carrying Amount	467,319,000	320,984,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	223,000	0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(20,911,000)	(36,650,000)
(amortized cost of $2,526,644 and $2,699,255, respectively)	446,631,000	284,334,000
US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	602,000	29,192,000
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-Sale, Net Carrying Amount	602,000	29,192,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(8,000)	(1,109,000)
(amortized cost of $2,526,644 and $2,699,255, respectively)	594,000	28,083,000
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	289,098,000	327,426,000
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0	(199,000)
Debt Securities, Available-for-Sale, Net Carrying Amount	289,098,000	327,227,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	259,000
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(31,386,000)	(60,254,000)
(amortized cost of $2,526,644 and $2,699,255, respectively)	257,712,000	267,232,000
Private Label Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	352,615,000	193,071,000
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-Sale, Net Carrying Amount	352,615,000	193,071,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	7,000	0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(35,712,000)	(34,659,000)
(amortized cost of $2,526,644 and $2,699,255, respectively)	316,910,000	158,412,000
Collateralized Loan Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	278,976,000	109,168,000
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-Sale, Net Carrying Amount	278,976,000	109,168,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	469,000	0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(29,000)	(752,000)
(amortized cost of $2,526,644 and $2,699,255, respectively)	279,416,000	108,416,000
Mortgage-backed Securities, Issued by Private Enterprises
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	13,585,000	22,126,000
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-Sale, Net Carrying Amount	13,585,000	22,126,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(1,213,000)	(1,313,000)
(amortized cost of $2,526,644 and $2,699,255, respectively)	12,372,000	20,813,000
Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	15,674,000	20,241,000
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-Sale, Net Carrying Amount	15,674,000	20,241,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(74,000)	(289,000)
(amortized cost of $2,526,644 and $2,699,255, respectively)	15,600,000	19,952,000
SBA asset-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	4,564,000	14,642,000
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-Sale, Net Carrying Amount	4,564,000	14,642,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(364,000)	(903,000)
(amortized cost of $2,526,644 and $2,699,255, respectively)	4,200,000	13,739,000
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Interest Receivable	$ 13,400,000	$ 13,400,000