FAIR VALUE DISCLOSURES - Summary of Financial Assets and Liabilities Measure at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Assets
Investment securities available-for-sale	$ 2,850,667	$ 3,021,126
Loans Held-for-sale, Fair Value Disclosure	11,500	9,200
Derivative Asset	295,131	269,776
Liabilities
Derivative liabilities	293,926	263,131
Fair Value, Option, Changes in Fair Value, Gain (Loss)	500
Financing Receivable, Held-for-Sale	10,400	8,500
Fair Value, Option, Aggregate Differences, Loans and Long-term Receivables	1,200	700
Fair Value, Measurements, Recurring
Assets
Investment securities available-for-sale	2,850,667	3,021,126
Derivative Asset		117,344
Total	3,157,338	3,300,135
Liabilities
Total	293,989	263,661
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | Fair value
Assets
Loans Held-for-sale, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1
Assets
Investment securities available-for-sale	30,912	31,243
Derivative Asset		0
Total	30,912	31,243
Liabilities
Total	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | Fair value
Assets
Loans Held-for-sale, Fair Value Disclosure	11,534	9,213
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2
Assets
Investment securities available-for-sale	2,787,626	2,956,938
Derivative Asset		117,344
Total	3,094,297	3,235,947
Liabilities
Total	293,989	263,661
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | Fair value
Assets
Loans Held-for-sale, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3
Assets
Investment securities available-for-sale	32,129	32,945
Derivative Asset		0
Total	32,129	32,945
Liabilities
Total	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1, 2 and 3
Assets
Loans Held-for-sale, Fair Value Disclosure	11,534	9,213
Interest Rate Contract [Member] | Fair Value, Measurements, Recurring
Assets
Derivative Asset	131,076
Liabilities
Derivative liabilities	131,323	118,105
Interest Rate Contract [Member] | Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1
Assets
Derivative Asset	0
Liabilities
Derivative liabilities	0	0
Interest Rate Contract [Member] | Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2
Assets
Derivative Asset	131,076
Liabilities
Derivative liabilities	131,323	118,105
Interest Rate Contract [Member] | Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3
Assets
Derivative Asset	0
Liabilities
Derivative liabilities	0	0
Foreign Exchange | Fair Value, Measurements, Recurring
Assets
Derivative Asset	162,496	145,556
Liabilities
Derivative liabilities	162,496	145,556
Foreign Exchange | Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1
Assets
Derivative Asset	0	0
Liabilities
Derivative liabilities	0	0
Foreign Exchange | Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2
Assets
Derivative Asset	162,496	145,556
Liabilities
Derivative liabilities	162,496	145,556
Foreign Exchange | Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3
Assets
Derivative Asset	0	0
Liabilities
Derivative liabilities	0	0
Cash Flow Hedging | Fair Value, Measurements, Recurring
Assets
Derivative Asset	1,565	6,896
Liabilities
Derivative liabilities	170	0
Cash Flow Hedging | Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1
Assets
Derivative Asset	0	0
Liabilities
Derivative liabilities	0	0
Cash Flow Hedging | Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2
Assets
Derivative Asset	1,565	6,896
Liabilities
Derivative liabilities	170	0
Cash Flow Hedging | Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3
Assets
Derivative Asset	0	0
Liabilities
Derivative liabilities	$ 0	$ 0