Mortgage servicing rights - Narrative (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||
---|---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
Dec. 31, 2018 |
|
Transfers and Servicing of Financial Assets [Abstract] | |||||
Mortgage servicing rights sold | $ 0 | $ 39,428 | $ 29,160 | $ 39,428 | |
Mortgage loans serviced | 2,034,374 | $ 3,181,483 | 2,034,374 | $ 3,181,483 | |
Mortgage escrow deposit | $ 121,400 | $ 121,400 | $ 53,468 |