Regulatory Net Worth Requirements (Details) $ in Millions	Sep. 30, 2021 USD ($)
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]
Minimum capital ratio	6.00%
HUD
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]
Minimum net worth requirement	$ 2.5
Actual net worth	3,100.0
Ginnie Mae, Freddie Mac and Fannie Mae
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]
Minimum net worth requirement	714.8
Liquidity requirement	$ 94.7

Amount of minimum net worth required for mortgage banking as defined by regulatory framework.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant