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Derivative Financial Instruments - Schedule of Notional Amounts of Derivative Contracts Outstanding (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Derivative [Line Items]
Notional amount	$ 9,756,800	$ 6,828,335
IRLCs
Derivative [Line Items]
Notional amount	152,800	82,335
Derivative contracts to manage future loan sale execution risk | Interest rate swaps
Derivative [Line Items]
Notional amount	8,322,000	5,638,177
Derivative contracts to manage future loan sale execution risk | Interest rate caps
Derivative [Line Items]
Notional amount	405,000	405,000
Derivative contracts to manage future loan sale execution risk | Home loan pipeline hedges
Derivative [Line Items]
Notional amount	349,000	126,000
Derivative contracts not designed to manage future loan sale execution risk | Interest rate swaps
Derivative [Line Items]
Notional amount	123,000	171,823
Derivative contracts not designed to manage future loan sale execution risk | Interest rate caps
Derivative [Line Items]
Notional amount	$ 405,000	$ 405,000

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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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480237/815-40-50-5

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1A

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