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PORTFOLIO LOANS - Schedule of Distribution of Portfolio Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	$ 13,598,266		$ 7,697,087
ACL	(174,181)	$ (183,334)	(83,404)	$ (84,981)	$ (85,226)	$ (91,740)
Portfolio loans, net	13,424,085		7,613,683
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	10,919,490		5,552,288
Commercial loans | C&I and other commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	4,395,871		1,904,515
ACL	(59,436)	(68,578)	(21,589)	(21,009)	(20,286)	(21,256)
Commercial loans | CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	5,424,095		3,269,564
ACL	(70,844)	(70,935)	(32,301)	(33,735)	(35,104)	(35,465)
Commercial loans | Real estate construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	1,099,524		378,209
ACL	(12,193)	(13,072)	(3,345)	(3,771)	(3,722)	(5,163)
Retail loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	2,678,776		2,144,799
Retail loans | CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	2,196,246		1,696,457
ACL	(29,843)	(29,042)	(23,711)	(23,979)	(23,729)	(26,298)
Retail loans | Retail other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	482,530		448,342
ACL	$ (1,865)	$ (1,707)	$ (2,458)	$ (2,487)	$ (2,385)	$ (3,558)

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
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-Publisher FASB
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
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-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

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-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

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