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Segment Information - Origination Data (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Segment Information |  |  |  |  |  |
Origination Volumes | $ 928,180,800 | $ 714,820,818 |  | $ 3,181,367,322 | $ 714,820,818 |
Loan Sales Data: |  |  |  |  |  |
Loan Sales |  | $ 970,000,000 |  |  | $ 970,000,000 |
Sales margin (fee-based services as a % of loan sales) | 1.63% | 1.76% |  | 1.52% | 1.76% |
MSR rate (MSR income as a % of loan commitments) | 2.04% | 2.23% |  | 1.77% | 2.23% |
Structured Business |  |  |  |  |  |
Segment Information |  |  |  |  |  |
New loan originations | $ 473,171,000 | $ 266,599,500 |  | $ 1,057,003,885 | $ 654,967,500 |
Loan payoffs / paydowns | 270,010,000 | 118,346,618 |  | 723,976,741 | 418,433,132 |
Agency Business |  |  |  |  |  |
Segment Information |  |  |  |  |  |
Origination Volumes | 996,721,800 | 850,419,655 |  | 3,307,873,722 | 850,419,655 |
Loan Sales Data: |  |  |  |  |  |
Loan Sales | 1,052,073,409 | 551,834,215 | [1] | 3,621,276,437 | 551,834,215 | [1]
Fannie Mae | Agency Business |  |  |  |  |  |
Segment Information |  |  |  |  |  |
Origination Volumes | 650,373,500 | 668,644,832 |  | 2,216,819,525 | 668,644,832 |
Loan Sales Data: |  |  |  |  |  |
Loan Sales | 665,959,500 | 430,371,100 |  | 2,569,821,000 | 430,371,100 |
Freddie Mac | Agency Business |  |  |  |  |  |
Segment Information |  |  |  |  |  |
Origination Volumes | 328,075,000 | 157,145,000 |  | 880,597,200 | 157,145,000 |
Loan Sales Data: |  |  |  |  |  |
Loan Sales | 342,629,800 | 104,448,000 |  | 862,376,636 | 104,448,000 |
FHA | Agency Business |  |  |  |  |  |
Segment Information |  |  |  |  |  |
Origination Volumes | 18,273,300 | 24,629,823 |  | 189,086,997 | 24,629,823 |
Loan Sales Data: |  |  |  |  |  |
Loan Sales | $ 43,484,109 | $ 17,015,115 |  | 167,708,801 | $ 17,015,115 |
CMBS/Conduit | Agency Business |  |  |  |  |  |
Segment Information |  |  |  |  |  |
Origination Volumes |  |  |  | 21,370,000 |  |
Loan Sales Data: |  |  |  |  |  |
Loan Sales |  |  |  | $ 21,370,000 |  |
[1] | Loan sales were $970.0 million for the three and nine months ended September 30, 2016, including loans that were acquired as part of the Acquisition.

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