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Management of Financial Risk (Capital Management) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Management of Financial Risk [abstract]
Equity	$ 725,770	$ 635,426	$ 602,804
Credit facilities	158,616	146,535	$ 69,302
Lease obligations	19,497	23,879
Less: Cash, cash equivalents and short-term investments	(131,898)	(83,404)
Capital amount	$ 771,985	$ 722,436

X

- Definition

The capital structure consists of equity comprising of share capital, reserves and retained earnings as well as debt facilities, equipment financing obligations less cash, cash equivalents and short-term investments

+ References

No definition available.

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- Definition

The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value.

+ References

No definition available.

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- References

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- Definition

The amount of residual interest in the assets of the entity after deducting all its liabilities.

+ References

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- Definition

The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

+ References

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- Definition

The non-current portion of non-current loans received. [Refer: Loans received]

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