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LOANS RECEIVABLE - Interest Rate Terms (Details) $ in Thousands	Sep. 30, 2025 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 11,391,506
% of gross loans, fixed-rate	56.10%
Gross loans, adjustable rate	$ 8,896,832
% of gross loans, adjustable rate	43.90%
Within 1 year
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 532,838
% of gross loans, fixed-rate	2.60%
Gross loans, adjustable rate	$ 6,415,163
% of gross loans, adjustable rate	31.60%
1 to 3 years
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 808,581
% of gross loans, fixed-rate	4.00%
Gross loans, adjustable rate	$ 1,617,496
% of gross loans, adjustable rate	8.00%
3 to 5 years
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 1,125,285
% of gross loans, fixed-rate	5.50%
Gross loans, adjustable rate	$ 665,213
% of gross loans, adjustable rate	3.30%
5 to 10 years
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 2,065,111
% of gross loans, fixed-rate	10.20%
Gross loans, adjustable rate	$ 188,729
% of gross loans, adjustable rate	0.90%
10 to 20 years
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 1,104,003
% of gross loans, fixed-rate	5.40%
Gross loans, adjustable rate	$ 7,492
% of gross loans, adjustable rate	0.10%
Over 20 years
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 5,755,688
% of gross loans, fixed-rate	28.40%
Gross loans, adjustable rate	$ 2,739
% of gross loans, adjustable rate	0.00%

X

- Definition

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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 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-3

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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