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SEGMENT INFORMATION - Reconciliation of the Reportable Segment Financial Information (Details) - Segment Reconciling Items [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Average assets:
Total average interest-earning assets for segments	$ 18,239,229	$ 18,036,587	$ 18,274,913	$ 18,029,907
Average non-interest-earning assets	789,563	846,787	783,834	845,490
Total consolidated average assets	$ 19,028,792	$ 18,883,374	$ 19,058,747	$ 18,875,397

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Average amount outstanding of interest-earning and noninterest-earning assets.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Regulation S-K (SK)
-Number 229
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