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SEGMENT INFORMATION - Reconciliation of total segment operating noninterest expenses to total consolidated noninterest expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting, Reconciling Item for Non Interest Expenses from Segment to Consolidated [Line Items]
Operating noninterest expenses	$ 118,999	$ 113,038	$ 237,083	$ 227,090
Amortization of intangible assets	3,877	3,705	7,453	7,372
Acquisition expenses	104	(1)	139	56
Acquisition-related contingent consideration adjustment	0	1,000	0	1,000
Litigation accrual	0	0	119	0
Operating Segment
Segment Reporting, Reconciling Item for Non Interest Expenses from Segment to Consolidated [Line Items]
Operating noninterest expenses	116,159	109,461	231,762	221,024
Inter segment elimination
Segment Reporting, Reconciling Item for Non Interest Expenses from Segment to Consolidated [Line Items]
Operating noninterest expenses	$ (1,141)	$ (1,127)	$ (2,390)	$ (2,362)

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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- Definition

Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

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Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

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Total aggregate amount of all noninterest expense.

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