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Segment Information - Origination Data (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Information
Origination Volumes	$ 1,206,723	$ 1,302,128	$ 2,473,941	$ 2,149,091
Loan Sales Data:
Sales margin (fee-based services as a % of loan sales)	1.32%	1.54%	1.38%	1.51%
MSR rate (MSR income as a % of loan commitments)	2.69%	1.44%	2.20%	1.53%
Structured Business
Segment Information
New loan originations	$ 300,481	$ 1,014,103	$ 1,156,710	$ 1,430,398
Loan payoffs / paydowns	159,174	503,130	434,466	782,601
Agency Business
Segment Information
Origination Volumes	1,400,556	1,288,286	2,482,528	2,134,199
Loan Sales Data:
Loan Sales	1,992,889	923,046	2,949,949	2,024,813
Agency Business | Fannie Mae
Segment Information
Origination Volumes	1,140,181	937,977	1,722,154	1,484,863
Loan Sales Data:
Loan Sales	1,063,923	668,063	1,817,967	1,415,001
Agency Business | Private Label
Segment Information
Origination Volumes	49,122		331,467
Loan Sales Data:
Loan Sales	727,154		727,154
Agency Business | Freddie Mac
Segment Information
Origination Volumes	135,720	234,851	335,431	427,343
Loan Sales Data:
Loan Sales	171,688	176,544	351,391	400,317
Agency Business | FHA
Segment Information
Origination Volumes	75,533	43,558	93,476	44,668
Loan Sales Data:
Loan Sales	$ 30,124	6,539	$ 53,437	32,170
Agency Business | CMBS/Conduit
Segment Information
Origination Volumes		71,900		177,325
Loan Sales Data:
Loan Sales		$ 71,900		$ 177,325

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Amount of loans originated during the period.

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Amount of loans originated through loan payoffs and paydowns.

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Amount of new loans originated during the period

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Originated mortgage servicing rights rate, MSR income as a percent of loan commitments.

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The cash inflow from sales of loans that are secured with real estate mortgages and are held with the intention to resell in the near future.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3461-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585

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