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Note 23 - Equity-settled Share-based Expense - Other Equity Share Units Granted (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Restricted stock units (RSUs) [member]
Statement Line Items [Line Items]
Grants	88,494	80,234
RSU dividend reinvestments	7,324	3,505
Restricted stock units (RSUs) [member] | January 11, 2016 [member]
Statement Line Items [Line Items]
Grants	60,645	60,645
Restricted stock units (RSUs) [member] | March 23, 2016 [member]
Statement Line Items [Line Items]
Grants	10,965	10,967
Restricted stock units (RSUs) [member] | June 8, 2016 [member]
Statement Line Items [Line Items]
Grants	5,117	5,117
Restricted stock units (RSUs) [member] | January 19, 2017 [member]
Statement Line Items [Line Items]
Grants	4,443
Performance share units (PSUs) [member]
Statement Line Items [Line Items]
Grants	324,694	306,920
Performance share units (PSUs) [member] | January 11, 2016 [member]
Statement Line Items [Line Items]
Grants	242,579	242,579
Performance share units (PSUs) [member] | March 23, 2016 [member]
Statement Line Items [Line Items]
Grants	43,871	43,871
Performance share units (PSUs) [member] | June 8, 2016 [member]
Statement Line Items [Line Items]
Grants	20,470	20,470
Performance share units (PSUs) [member] | January 19, 2017 [member]
Statement Line Items [Line Items]
Grants	17,774

X

- Definition

The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement as a result of dividends being re-invested.

+ References

No definition available.

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- References

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X

- Definition

The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2017-01-01
-Paragraph 47
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_47_b&doctype=Standard
-URIDate 2017-03-09

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 2
-IssueDate 2017-01-01
-Paragraph 45
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45&doctype=Standard
-URIDate 2017-03-09

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