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Investment Securities - Contractual Maturities of Securities Available-for-Sale (Details) $ in Thousands	Jun. 30, 2024 USD ($)
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	310,033
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Five Years Through Ten Years	461,490
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Ten Years	1,842,378
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	290,614
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Five Years Through Ten Years	414,429
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Ten Years	(1,538,988)
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	2,613,901
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	2,244,031
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	707
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Ten Years	1,333,286
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	677
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Ten Years	(1,101,184)
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	1,333,993
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	1,101,861
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	234,514
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Five Years Through Ten Years	6,129
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Ten Years	17,277
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	219,484
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Five Years Through Ten Years	5,653
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Ten Years	(16,206)
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	257,920
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	241,343
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	51,213
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	261,875
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	47,541
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	(230,719)
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	313,088
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	278,260
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	16,876
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Five Years Through Ten Years	17,665
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	16,445
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Five Years Through Ten Years	16,612
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	34,541
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	33,057
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	5,000
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Five Years Through Ten Years	322,471
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	4,830
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Five Years Through Ten Years	277,132
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	327,471
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	281,962
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	109,168
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	109,354
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	109,168
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	109,354
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	1,170
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Ten Years	17,974
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	1,132
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Ten Years	(16,944)
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	19,144
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	18,076
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	2,430
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Five Years Through Ten Years	4,180
Contractual Maturities of Securities Available-for-Sale, Amortized Cost, Due After Ten Years	6,778
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	2,314
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Five Years Through Ten Years	3,869
Contractual Maturities of Securities Available-for-Sale, Fair Value, Due After Ten Years	(6,205)
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	13,388
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	12,388
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	187,716
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	(150,286)
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	187,716
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	150,286
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	17,472
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	(17,444)
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	17,472
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 17,444

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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).

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