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Loans Receivable - Interest Rate Terms (Details) $ in Thousands	Sep. 30, 2024 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 11,340,860
% of gross loans, fixed-rate	53.70%
Gross loans, adjustable rate	$ 9,779,247
% of gross loans, adjustable rate	46.30%
Within 1 year
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 179,267
% of gross loans, fixed-rate	0.80%
Gross loans, adjustable rate	$ 6,218,630
% of gross loans, adjustable rate	29.40%
1 to 3 years
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 1,215,170
% of gross loans, fixed-rate	5.80%
Gross loans, adjustable rate	$ 2,101,732
% of gross loans, adjustable rate	10.00%
3 to 5 years
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 764,056
% of gross loans, fixed-rate	3.60%
Gross loans, adjustable rate	$ 1,148,969
% of gross loans, adjustable rate	5.40%
5 to 10 years
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 2,582,522
% of gross loans, fixed-rate	12.20%
Gross loans, adjustable rate	$ 306,485
% of gross loans, adjustable rate	1.50%
10 to 20 years
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 503,677
% of gross loans, fixed-rate	2.40%
Gross loans, adjustable rate	$ 311
% of gross loans, adjustable rate	0.00%
Over 20 years
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 6,096,168
% of gross loans, fixed-rate	28.90%
Gross loans, adjustable rate	$ 3,120
% 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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Amount of loan with fixed rate of interest.

+ 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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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Section 50
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