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INVESTMENT SECURITIES - Amortized Cost and Fair Value of Available for Sale Securities by Contractual Maturity (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Amortized Cost |  |
Due in one year or less | $ 309,115 |
Due from one year to five years | 599,286 |
Due from five to ten years | 114,430 |
Due after ten years | 7,933 |
Mortgage-backed securities | 928,274 |
Amortized Cost | 1,959,038 | $ 1,708,196
Estimated Fair Value |  |
Due in one year or less | 308,492 |
Due from one year to five years | 602,368 |
Due from five to ten years | 113,835 |
Due after ten years | 7,134 |
Mortgage-backed securities | 911,182 |
Estimated Fair Value | 1,943,011 | 1,671,260
Amortized Cost |  |
Due in one year or less | 0 |
Due from one year to five years | 0 |
Due from five to ten years | 0 |
Due after ten years | 33,597 |
Mortgage-backed securities | 140,160 |
Amortized Cost | 173,757 | 164,677
Estimated Fair Value |  |
Due in one year or less | 0 |
Due from one year to five years | 0 |
Due from five to ten years | 0 |
Due after ten years | 26,637 |
Mortgage-backed securities | 128,222 |
Estimated Fair Value | $ 154,859 | $ 144,028

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- Definition Fair value of securitized, pay-through debt securities collateralized by real estate mortgage loans classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant