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Investment Securities - Contractual Maturities of Securities Available-for-Sale (Details) $ in Thousands | Mar. 31, 2025 USD ($)
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Schedule of Investments [Line Items] |
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due Within One Year | $ 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After One Year Through Five Years | 48,061
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Five Years Through Ten Years | 447,847
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Ten Years | 2,079,485
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year Through Five Years | 47,879
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Five Years Through Ten Years | 421,711
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Ten Years | (1,864,468)
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost | 2,575,393
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value | 2,334,058
Agency residential MBS |
Schedule of Investments [Line Items] |
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After One Year Through Five Years | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Five Years Through Ten Years | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Ten Years | 1,033,674
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year Through Five Years | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Five Years Through Ten Years | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Ten Years | (867,042)
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost | 1,033,674
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value | 867,042
Agency commercial MBS |
Schedule of Investments [Line Items] |
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After One Year Through Five Years | 39,959
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Five Years Through Ten Years | 9,994
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Ten Years | 12,173
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year Through Five Years | 39,928
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Five Years Through Ten Years | 9,983
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Ten Years | (11,293)
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost | 62,126
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value | 61,204
Agency residential CMOs |
Schedule of Investments [Line Items] |
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After One Year Through Five Years | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Five Years Through Ten Years | 14,655
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Ten Years | 565,021
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year Through Five Years | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Five Years Through Ten Years | 14,775
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Ten Years | (550,293)
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost | 579,676
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value | 565,068
Municipal securities |
Schedule of Investments [Line Items] |
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After One Year Through Five Years | 602
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Five Years Through Ten Years | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Ten Years | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year Through Five Years | 597
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Five Years Through Ten Years | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Ten Years | 0
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost | 602
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value | 597
Corporate Debt Securities |
Schedule of Investments [Line Items] |
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After One Year Through Five Years | 7,500
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Five Years Through Ten Years | 281,577
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Ten Years | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year Through Five Years | 7,354
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Five Years Through Ten Years | 256,049
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Ten Years | 0
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost | 289,077
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value | 263,403
Collateralized loan obligations |
Schedule of Investments [Line Items] |
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After One Year Through Five Years | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Five Years Through Ten Years | 136,918
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Ten Years | 106,567
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year Through Five Years | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Five Years Through Ten Years | 136,471
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Ten Years | (106,414)
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost | 243,485
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value | 242,885
Private label commercial MBS |
Schedule of Investments [Line Items] |
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After One Year Through Five Years | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Five Years Through Ten Years | 580
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Ten Years | 11,953
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year Through Five Years | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Five Years Through Ten Years | 571
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Ten Years | (10,875)
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost | 12,533
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value | 11,446
SBA securities |
Schedule of Investments [Line Items] |
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After One Year Through Five Years | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Five Years Through Ten Years | 4,123
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Ten Years | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year Through Five Years | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Five Years Through Ten Years | 3,862
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Ten Years | 0
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost | 4,123
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value | 3,862
Private Label Collateralized Mortgage Obligations |
Schedule of Investments [Line Items] |
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After One Year Through Five Years | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Five Years Through Ten Years | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Ten Years | 334,859
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year Through Five Years | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Five Years Through Ten Years | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Ten Years | (303,327)
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost | 334,859
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value | 303,327
Asset-backed Securities |
Schedule of Investments [Line Items] |
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After One Year Through Five Years | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Five Years Through Ten Years | 0
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Ten Years | 15,238
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due Within One Year Through Five Years | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Five Years Through Ten Years | 0
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Ten Years | (15,224)
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost | 15,238
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value | $ 15,224

X
- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-3 + Details
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-3 + Details
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