Line items represent reporting concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 12
-Sentence Column A

Name:	invest_InvestmentLineItems
Namespace Prefix:	invest_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical)		9 Months Ended
CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical)	Jun. 20, 2017	Sep. 30, 2017	Mar. 16, 2017	Sep. 21, 2012
Fixed interest rate \| Senior Unsecured Notes at 6.75%
Investment [Line Items]
Interest rate		6.75%	6.75%	6.75%
Disposal Of Interest In Cote Gold Project
Investment [Line Items]
Proportion of ownership interest in joint venture	30.00%	30.00%