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COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands			1 Months Ended	6 Months Ended
	Jan. 03, 2017	Dec. 31, 2016	Nov. 30, 2016	Dec. 31, 2016
Rainy River
Commitments and Contingencies
Scheduled payment amount			$ 75,000	$ 0
Wassa and Prestea
Commitments and Contingencies
Scheduled payment amount	$ 0	$ 10,000
Final scheduled payment	$ 10,000
Ilovica
Commitments and Contingencies
Scheduled payment amount				$ 163,750
Voisey's Bay \| Voisey's Bay Holding Corporation
Commitments and Contingencies
Percentage of ownership interest held in Labrador Nickel Royalty Limited Partnership ("LNRLP")				90.00%
Voisey's Bay \| Altius
Commitments and Contingencies
Percentage of ownership interest held in Labrador Nickel Royalty Limited Partnership ("LNRLP")				10.00%