SUBSEQUENT EVENT (Details) - Subsequent Event - Mount Milligan streaming agreement - Centerra - Thompson Creek - $ / oz	Oct. 20, 2016	Oct. 19, 2016
Subsequent event
Gold streaming interest	35.00%	52.25%
Copper streaming interest	18.75%
Cash payment for each ounce of gold (in dollars per ounce)	435
Percentage of spot price per metric tonne of copper delivered	15.00%
Maximum period between concentrate shipment and final settlement	5 months