Rollforward of Mortgage Servicing Rights, at Fair Value (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
Dec. 31, 2017 |
|
| Servicing Asset at Fair Value, Amount [Roll Forward] | |||||
| Mortgage servicing rights, at fair value, at beginning of period | $ 1,450,261 | $ 898,025 | $ 1,086,717 | $ 693,815 | |
| Additions from purchases of mortgage servicing rights | 201,197 | 66,280 | 480,462 | 340,156 | |
| Additions from sales of residential mortgage loans | 0 | 0 | 0 | 20 | |
| Subtractions from sales of mortgage servicing rights | 0 | 0 | 0 | 946 | |
| Changes in valuation inputs or assumptions used in the valuation model | 62,680 | (154) | 209,610 | (23,083) | |
| Other changes in fair value | (42,085) | (28,595) | (107,754) | (66,543) | |
| Other changes | (8,029) | (4,943) | (5,011) | (12,806) | |
| Mortgage servicing rights, at fair value, at end of period | 1,664,024 | $ 930,613 | 1,664,024 | $ 930,613 | |
| Mortgage servicing rights, at fair value, pledged as collateral for borrowings | $ 1,200,000 | $ 1,200,000 | $ 600,000 | ||
| X | ||||||||||
- Definition The value of new servicing assets, subsequently measured at fair value, created during the current period through sales of mortgage loans held-for-sale. No definition available.
|
| X | ||||||||||
- Definition The carrying amount, as of the date of the latest financial statement presented, of other assets which are owned but transferred to serve as collateral for the payment of the related debt obligation, primarily a secured borrowing or repurchase agreement, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Definition Amount of increase (decrease) in fair value from changes in the inputs, assumptions, or model used to calculate the fair value of the contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Decrease in servicing assets subsequently measured at fair value resulting from conveyance of servicing rights to unrelated parties. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of increase (decrease) from changes in fair value classified as other for a contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of increase (decrease) in fair value from changes classified as other for a contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|