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Securities Securities - Available for sale (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Securities, Available-for-sale [Abstract] |  |
Amortized Cost | $ 5,787,403 | $ 4,548,772
Gross Unrealized Gain | 16,580 | 26,982
Gross Unrealized Loss | 221,614 | 258,224
Securities available-for-sale, at fair value | 5,582,369 | 4,317,530
Available-for-sale, Amortized Cost |  |
Due in one year of less | 104,404 |
Due in one year to five years | 260,862 |
Due in five to ten years | 408,495 |
Due after ten years | 2,899,412 |
Mortgage-backed securities | 2,068,950 |
Asset-backed securities | 45,280 |
Amortized Cost | 5,787,403 | 4,548,772
Available-for-sale, Fair Value |  |
Due in one year or less | 104,431 |
Due in one year to five years | 241,023 |
Due in five years to ten years | 382,963 |
Due after ten years | 2,846,255 |
Mortgage-backed securities | 1,962,359 |
Asset-backed securities | 45,338 |
Securities available-for-sale, at fair value | 5,582,369 | 4,317,530
US Treasury Securities |  |
Debt Securities, Available-for-sale [Abstract] |  |
Amortized Cost | 1,419,727 | 907,990
Gross Unrealized Gain | 28 | 2
Gross Unrealized Loss | 14,277 | 14,580
Securities available-for-sale, at fair value | 1,405,478 | 893,412
Available-for-sale, Amortized Cost |  |
Amortized Cost | 1,419,727 | 907,990
Available-for-sale, Fair Value |  |
Securities available-for-sale, at fair value | 1,405,478 | 893,412
U.S. Government Agency Securities |  |
Debt Securities, Available-for-sale [Abstract] |  |
Amortized Cost | 238,636 | 284,607
Gross Unrealized Gain | 2 | 0
Gross Unrealized Loss | 24,572 | 21,877
Securities available-for-sale, at fair value | 214,066 | 262,730
Available-for-sale, Amortized Cost |  |
Amortized Cost | 238,636 | 284,607
Available-for-sale, Fair Value |  |
Securities available-for-sale, at fair value | 214,066 | 262,730
Mortgage-backed Agency Securities |  |
Debt Securities, Available-for-sale [Abstract] |  |
Amortized Cost | 2,068,950 | 1,071,963
Gross Unrealized Gain | 976 | 444
Gross Unrealized Loss | 107,567 | 125,017
Securities available-for-sale, at fair value | 1,962,359 | 947,390
Available-for-sale, Amortized Cost |  |
Amortized Cost | 2,068,950 | 1,071,963
Available-for-sale, Fair Value |  |
Securities available-for-sale, at fair value | 1,962,359 | 947,390
State and Municipal Securities |  |
Debt Securities, Available-for-sale [Abstract] |  |
Amortized Cost | 1,537,910 | 1,604,874
Gross Unrealized Gain | 15,382 | 26,129
Gross Unrealized Loss | 46,735 | 45,108
Securities available-for-sale, at fair value | 1,506,557 | 1,585,895
Available-for-sale, Amortized Cost |  |
Amortized Cost | 1,537,910 | 1,604,874
Available-for-sale, Fair Value |  |
Securities available-for-sale, at fair value | 1,506,557 | 1,585,895
Asset-backed Securities |  |
Debt Securities, Available-for-sale [Abstract] |  |
Amortized Cost | 45,280 | 201,577
Gross Unrealized Gain | 85 | 338
Gross Unrealized Loss | 27 | 10,280
Securities available-for-sale, at fair value | 45,338 | 191,635
Available-for-sale, Amortized Cost |  |
Amortized Cost | 45,280 | 201,577
Available-for-sale, Fair Value |  |
Securities available-for-sale, at fair value | 45,338 | 191,635
Corporate Notes |  |
Debt Securities, Available-for-sale [Abstract] |  |
Amortized Cost | 476,900 | 477,761
Gross Unrealized Gain | 107 | 69
Gross Unrealized Loss | 28,436 | 41,362
Securities available-for-sale, at fair value | 448,571 | 436,468
Available-for-sale, Amortized Cost |  |
Amortized Cost | 476,900 | 477,761
Available-for-sale, Fair Value |  |
Securities available-for-sale, at fair value | $ 448,571 | $ 436,468

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- Definition Represents amount of available-for-sale debt securities at cost, net of adjustment of asset-backed securities. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments. + References No definition available. + Details
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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 + Details
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