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Investment Securities - Schedule of Amortized, Gross Unrealized Gains and Losses, and Fair Value on Investment Securities, Available for Sale (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Investment securities available for sale: |  |
Amortized Cost | $ 835,592 | $ 1,227,787
Gross Unrealized Gains | 1,085 | 2,786
Gross Unrealized Losses | (72,283) | (96,220)
Investment securities available for sale, at fair value, net (amortized cost of $835,592 and $1,227,787, respectively) | 764,394 | 1,134,353
Investment securities held to maturity: |  |
Amortized Cost | (703,285) | (739,442)
Gross Unrecognized Gains | 27 | 0
Gross Unrecognized Losses | (79,860) | (76,992)
Investment securities held to maturity, at amortized cost, net (fair value of $623,452 and $662,450, respectively) | 623,452 | 662,450
US Treasury and Government [Member] |  |
Investment securities available for sale: |  |
Amortized Cost | 14,934 | 16,047
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (2,390) | (2,297)
Investment securities available for sale, at fair value, net (amortized cost of $835,592 and $1,227,787, respectively) | 12,544 | 13,750
Investment securities held to maturity: |  |
Amortized Cost | (151,216) | (151,075)
Gross Unrecognized Gains | 0 | 0
Gross Unrecognized Losses | (28,874) | (27,701)
Investment securities held to maturity, at amortized cost, net (fair value of $623,452 and $662,450, respectively) | 122,342 | 123,374
Municipal securities |  |
Investment securities available for sale: |  |
Amortized Cost | 61,169 | 92,231
Gross Unrealized Gains | 12 | 9
Gross Unrealized Losses | (10,239) | (12,715)
Investment securities available for sale, at fair value, net (amortized cost of $835,592 and $1,227,787, respectively) | 50,942 | 79,525
Residential CMO and MBS |  |
Investment securities available for sale: |  |
Amortized Cost | 407,520 | 555,518
Gross Unrealized Gains | 711 | 2,656
Gross Unrealized Losses | (38,900) | (46,125)
Investment securities available for sale, at fair value, net (amortized cost of $835,592 and $1,227,787, respectively) | 369,331 | 512,049
Investment securities held to maturity: |  |
Amortized Cost | (244,309) | (267,204)
Gross Unrecognized Gains | 0 | 0
Gross Unrecognized Losses | (18,563) | (14,101)
Investment securities held to maturity, at amortized cost, net (fair value of $623,452 and $662,450, respectively) | 225,746 | 253,103
Commercial CMO and MBS |  |
Investment securities available for sale: |  |
Amortized Cost | 330,249 | 538,910
Gross Unrealized Gains | 134 | 88
Gross Unrealized Losses | (20,642) | (34,740)
Investment securities available for sale, at fair value, net (amortized cost of $835,592 and $1,227,787, respectively) | 309,741 | 504,258
Investment securities held to maturity: |  |
Amortized Cost | (307,760) | (321,163)
Gross Unrecognized Gains | 27 | 0
Gross Unrecognized Losses | (32,423) | (35,190)
Investment securities held to maturity, at amortized cost, net (fair value of $623,452 and $662,450, respectively) | 275,364 | 285,973
Corporate obligations |  |
Investment securities available for sale: |  |
Amortized Cost | 11,700 | 7,745
Gross Unrealized Gains | 181 | 2
Gross Unrealized Losses | (111) | (134)
Investment securities available for sale, at fair value, net (amortized cost of $835,592 and $1,227,787, respectively) | 11,770 | 7,613
Other asset-backed securities |  |
Investment securities available for sale: |  |
Amortized Cost | 10,020 | 17,336
Gross Unrealized Gains | 47 | 31
Gross Unrealized Losses | (1) | (209)
Investment securities available for sale, at fair value, net (amortized cost of $835,592 and $1,227,787, respectively) | $ 10,066 | $ 17,158

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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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