Loans and Leases Composition of Loans and Leases Held for Investment (Details) - USD ($) $ in Thousands		Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross		$ 23,983,918	$ 25,796,714
Loans and Leases Receivable, Deferred Income		(26,542)	(45,043)
Loans held for investment, net		23,781,663	25,489,687
Loans and leases held for investment, net	[1]	23,542,303	25,208,000
Interest Receivable		12,600	10,000
Land and Acquisitions and Development Loans		223,900	228,900
Financing Receivable, Unamortized Purchase Premium (Discount)		175,713	261,984
Financing Receivable, Unamortized Purchase Premium		59,500	72,200
Financing Receivable, Unamortized Purchase Premium (Discount)		(235,200)	(334,200)
Loans and Finance Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Interest Receivable		96,800	111,300
Mortgages [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross		13,605,595	16,378,537
Real Estate Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	[2]	3,187,146	3,183,357
Commercial Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross		6,788,923	5,780,346
Consumer Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross		$ 402,254	$ 454,474

[1] Excludes accrued interest receivable of $96.8 million and $111.3 million at December 31, 2024 and 2023, which is recorded in "Other assets" on the consolidated balance sheets.

[2] Includes land and acquisition and development loans of $223.9 million and $228.9 million at December 31, 2024 and 2023. (2)    Represents net acquisition discounts of $235.2 million and net purchase premiums of $59.5 million at December 31, 2024, and net acquisition discounts of $334.2 million and purchase premiums of $72.2 million at December 31, 2023.