XML 127 R110.htm IDEA: XBRL DOCUMENT v3.19.1

Bank borrowings - Borrowing detail by maturity - (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Borrowings [abstract]
Non-Current Amount	$ 132,821
Credit facilities
Borrowings [abstract]
Non-Current Amount	$ 132,821

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- References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

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- Definition

The non-current portion of non-current borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard
-URIDate 2018-03-16

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- Details

Name:	ifrs-full_BorrowingsByNameAxis=gsm_CreditFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: