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Financial assets and other receivables - Securitization of trade receivables (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jul. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017
Securitization of trade receivables |  |  |
Interest earned on SPE loans |  | $ 3,403 | $ 1,313
Fixed-rate servicing fees |  | 2,961 | 622
Additional servicing fees earned |  | 11,174 |
Securitizations |  |  |
Securitization of trade receivables |  |  |
Upfront cash consideration |  | 227,360 | 166,525
Term of the securitization program | 3 years |  |
Trade receivables sold under securitization program |  | 2,059,000 | 850,000
Loss on transferral of trade receivables |  | (22,647) | (7,256)
Recognised assets representing continuing involvement in derecognised financial assets |  | 67,079 |
Maximum commitment by Finacity Capital Management |  | 3,000 |
Factoring of receivables |  |  |
Securitization of trade receivables |  |  |
Factored receivable |  | 6,102 | 3,801
Senior Subordinated Loan | Securitizations |  |  |
Securitization of trade receivables |  |  |
Amount |  | $ 59,474 |
Interest Rate |  | 4.00% |
Junior Subordinated Loan | Securitizations |  |  |
Securitization of trade receivables |  |  |
Amount |  | $ 277 |
Interest Rate |  | 30.00% |
Maximum | Securitizations |  |  |
Securitization of trade receivables |  |  |
Upfront cash consideration | $ 303,000 |  | $ 248,000

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