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Investment Securities Schedule of Amortized Cost and Fair Values of Debt Securities by Contractual Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Available for Sale
Due in one year or less	$ 15,672
Due from one year to five years	106,119
Due from five years to ten years	309,940
Due after ten years	842,177
Amortized cost, before securities without debt maturities	1,273,908
Amortized Cost	3,719,516	$ 2,698,259
Estimated Fair Value
Due in one year or less	15,532
Due from one year to five years	102,912
Due from five years to ten years	294,656
Due after ten years	702,157
Available for sale securities, debt maturities, before securities without single maturities	1,115,257
Estimated Fair Value	3,410,899	2,398,352
Amortized Cost
Due in one year or less	0
Due from one year to five years	0
Due from five years to ten years	0
Due after ten years	0
Debt securities, held-to-maturity, maturity, allocated and single maturity date, amortized cost, total	0
Amortized Cost	1,395,569	1,267,922
Estimated Fair Value
Due in one year or less	0
Due from one year to five years	0
Due from five years to ten years	0
Due after ten years	0
Debt securities, held-to-maturity, maturity, Allocated and single maturity date, fair value		0
Estimated Fair Value	1,183,449
Residential mortgage-backed securities
Available for Sale
Available-for-sale securities, amortized cost without single maturity date	1,029,846
Amortized Cost	1,029,846	223,273
Estimated Fair Value
Available-for-sale securities, debt maturities, without single maturity date, fair value	989,875
Estimated Fair Value	989,875	196,795
Amortized Cost
Debt securities, held-to-maturity, maturity, without single maturity date, amortized cost	537,856
Amortized Cost	537,856	407,075
Estimated Fair Value
Debt securities, held-to-maturity, maturity, without single maturity date, fair value	477,696
Estimated Fair Value	477,696	355,270
Commercial mortgage-backed securities
Available for Sale
Available-for-sale securities, amortized cost without single maturity date	617,605
Amortized Cost	617,605	627,364
Estimated Fair Value
Available-for-sale securities, debt maturities, without single maturity date, fair value	516,882
Estimated Fair Value	516,882	534,388
Amortized Cost
Debt securities, held-to-maturity, maturity, without single maturity date, amortized cost	857,713
Amortized Cost	857,713	860,847
Estimated Fair Value
Debt securities, held-to-maturity, maturity, without single maturity date, fair value	705,753
Estimated Fair Value	705,753	716,937
Collateralized mortgage obligations
Available for Sale
Available-for-sale securities, amortized cost without single maturity date	798,157
Amortized Cost	798,157	122,824
Estimated Fair Value
Available-for-sale securities, debt maturities, without single maturity date, fair value	788,885
Estimated Fair Value	788,885	$ 111,434
Amortized Cost
Debt securities, held-to-maturity, maturity, without single maturity date, amortized cost	0
Estimated Fair Value
Debt securities, held-to-maturity, maturity, without single maturity date, fair value	$ 0

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