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Investment Securities - Schedule of Amortized Cost and Estimated Fair Value of AFS and HTM Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 1,408,935 | $ 1,668,316
Gross Unrealized Gains | 36 | 45
Gross Unrealized Losses | (141,545) | (161,956)
Allowance for Credit Losses | (22) | (17)
Estimated Fair Value | 1,267,404 | 1,506,388
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | 939,953 | 1,017,693
HTM Allowance for credit losses | 1,306 | 1,956
Total investment securities held-to-maturity | 938,647 | 1,015,737
Gross Unrecognized Gains | 0 | 5
Gross Unrecognized Losses | (119,571) | (116,116)
Total investment securities held-to-maturity | 820,382 | 901,582
U.S. treasury bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 24,988 | 49,894
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (212) | (1,993)
Allowance for Credit Losses | 0 | 0
Estimated Fair Value | 24,776 | 47,901
U.S. agency securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 600,277 | 729,090
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (41,742) | (57,693)
Allowance for Credit Losses | 0 | 0
Estimated Fair Value | 558,535 | 671,397
Residential mortgage-backed securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 719,815 | 823,992
Gross Unrealized Gains | 36 | 45
Gross Unrealized Losses | (94,535) | (96,684)
Allowance for Credit Losses | 0 | 0
Estimated Fair Value | 625,316 | 727,353
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | 605,904 | 670,043
Gross Unrecognized Gains | 0 | 0
Gross Unrecognized Losses | (85,941) | (79,980)
Total investment securities held-to-maturity | 519,963 | 590,063
Commercial mortgage-backed securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 53,248 | 54,557
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (4,303) | (4,993)
Allowance for Credit Losses | 0 | 0
Estimated Fair Value | 48,945 | 49,564
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | 88,575 | 90,227
Gross Unrecognized Gains | 0 | 0
Gross Unrecognized Losses | (13,069) | (12,867)
Total investment securities held-to-maturity | 75,506 | 77,360
Municipal bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 8,607 | 8,783
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (593) | (293)
Allowance for Credit Losses | 0 | 0
Estimated Fair Value | 8,014 | 8,490
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | 114,060 | 125,114
Gross Unrecognized Gains | 0 | 5
Gross Unrecognized Losses | (11,389) | (8,540)
Total investment securities held-to-maturity | 102,671 | 116,579
Corporate bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 2,000 | 2,000
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (160) | (300)
Allowance for Credit Losses | (22) | (17)
Estimated Fair Value | 1,818 | 1,683
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | 131,414 | 132,309
Gross Unrecognized Gains | 0 | 0
Gross Unrecognized Losses | (9,172) | (14,729)
Total investment securities held-to-maturity | $ 122,242 | $ 117,580

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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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