v3.10.0.1

Clients and other receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Clients and other receivables [Abstract]
Trade receivables	$ 163,856	$ 186,728
Tax receivables	54,959	39,607
Prepayments	5,521	6,375
Other accounts receivable	12,059	11,739
Clients and other receivables	236,395	244,449
Up to 3 Months [Member]
Clients and other receivables [Abstract]
Trade receivables	163,856	186,728
Euros [Member]
Clients and other receivables [Abstract]
Trade receivables	91,303	109,165
Rand [Member]
Clients and other receivables [Abstract]
Trade receivables	25,193	23,792
Other [Member]
Clients and other receivables [Abstract]
Trade receivables	9,884	7,363
All Foreign Currencies [Member]
Clients and other receivables [Abstract]
Trade receivables	$ 126,380	$ 140,320

X

- Definition

The amount of current prepayments. [Refer: Prepayments]

+ References

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X

- Definition

The amount of current receivables from taxes other than income tax. [Refer: Receivables from taxes other than income tax]

+ References

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X

- Definition

The amount of current trade receivables. [Refer: Trade receivables]

+ References

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X

- Definition

The amount of current other receivables. [Refer: Other receivables]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition

The amount of current trade receivables and current other receivables. [Refer: Current trade receivables; Other current receivables]

+ References

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