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Disclosures on equity (Details 2) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about controls capital management [Abstract]
Reserve for currency exchange conversion	$ (26,307)	$ (24,913)	$ (19,463)
Reserve for cash flow hedges	7,971	2,248	64
Reserve for gains and losses from financial assets measured at fair value through other comprehensive income	(1,111)	2,937	3,513
Reserve for actuarial gains or losses in defined benefit plans	(6,884)	(5,953)	(4,834)
Other reserves	11,332	11,332	7,832
Total other reserves	$ (14,999)	$ (14,349)	$ (12,888)

X

- Definition

A component of equity representing reserves within equity, not including retained earnings. [Refer: Retained earnings]

+ References

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X

- Definition

A component of equity representing the accumulated portion of gain (loss) on a hedging instrument that is determined to be an effective hedge for cash flow hedges. [Refer: Cash flow hedges [member]]

+ References

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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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X

- Definition

A component of equity representing exchange differences on translation of financial statements of foreign operations recognised in other comprehensive income and accumulated in equity. [Refer: Other comprehensive income]

+ References

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- Definition

A component of equity representing the reserve of gains and losses on financial assets measured at fair value through other comprehensive income. [Refer: Financial assets measured at fair value through other comprehensive income; Other comprehensive income]

+ References

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X

- Definition

A component of equity representing the accumulated remeasurements of defined benefit plans. [Refer: Defined benefit plans [member]]

+ References

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- References

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- Definition

The amount of other reserves not specified.

+ References

No definition available.

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