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Segment Information - Key Servicing Metrics (Details) - Agency Business - MSRs - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Segment Information |  |
UPB of Servicing Portfolio | $ 20,059,077 | $ 18,601,641
Wtd. Avg. Servicing Fee Rate (basis points) | 0.438% | 0.452%
Wtd. Avg. Life of Servicing Portfolio (in years) | 8 years 9 months 18 days | 8 years 7 months 6 days
Fannie Mae |  |
Segment Information |  |
UPB of Servicing Portfolio | $ 14,832,844 | $ 13,562,667
Wtd. Avg. Servicing Fee Rate (basis points) | 0.493% | 0.513%
Wtd. Avg. Life of Servicing Portfolio (in years) | 7 years 9 months 18 days | 7 years 4 months 24 days
Freddie Mac |  |
Segment Information |  |
UPB of Servicing Portfolio | $ 4,534,714 | $ 4,394,287
Wtd. Avg. Servicing Fee Rate (basis points) | 0.30% | 0.308%
Wtd. Avg. Life of Servicing Portfolio (in years) | 10 years 7 months 6 days | 10 years 9 months 18 days
FHA |  |
Segment Information |  |
UPB of Servicing Portfolio | $ 691,519 | $ 644,687
Wtd. Avg. Servicing Fee Rate (basis points) | 0.154% | 0.155%
Wtd. Avg. Life of Servicing Portfolio (in years) | 18 years 8 months 12 days | 19 years 7 months 6 days

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