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SHARE-BASED PAYMENTS - Schedule of Share-based Compensation, Outstanding and Exercisable Options (Details) - 12 months ended Dec. 31, 2016	USD ($) $ / shares shares	CAD / shares
Canada, Dollars
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, quantity (in shares) | shares	656,120
Options outstanding, intrinsic value | $	$ 0.00
Options exercisable, quantity (in shares) | shares	629,370
Exercisable options, intrinsic value | $	$ 0.00
Canada, Dollars | $0.00 to $4.99
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, quantity (in shares) | shares	0
Options outstanding, weighted average price (per share) | CAD / shares		CAD 0.00
Options outstanding, weighted average remaining contractual life	0 years
Options outstanding, intrinsic value | $	$ 0.00
Options exercisable, quantity (in shares) | shares	0
Options exercisable, weighted average price (per share) | CAD / shares		0.00
Options exercisable, weighted average remaining contractual life	0 years
Exercisable options, intrinsic value | $	$ 0.00
Canada, Dollars | $0.00 to $4.99 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, weighted average price (per share) | CAD / shares		0.00
Options exercisable, weighted average price (per share) | CAD / shares		0.00
Canada, Dollars | $0.00 to $4.99 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, weighted average price (per share) | CAD / shares		4.99
Options exercisable, weighted average price (per share) | CAD / shares		4.99
Canada, Dollars | $5.00 to $9.99
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, quantity (in shares) | shares	421,850
Options outstanding, weighted average price (per share) | CAD / shares		6.55
Options outstanding, weighted average remaining contractual life	1 year 4 months 14 days
Options outstanding, intrinsic value | $	$ 0.00
Options exercisable, quantity (in shares) | shares	395,100
Options exercisable, weighted average price (per share) | CAD / shares		6.99
Options exercisable, weighted average remaining contractual life	1 year 5 months 17 days
Exercisable options, intrinsic value | $	$ 0.00
Canada, Dollars | $5.00 to $9.99 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, weighted average price (per share) | CAD / shares		5.00
Options exercisable, weighted average price (per share) | CAD / shares		5.00
Canada, Dollars | $5.00 to $9.99 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, weighted average price (per share) | CAD / shares		9.99
Options exercisable, weighted average price (per share) | CAD / shares		9.99
Canada, Dollars | $10.00 to $14.99
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, quantity (in shares) | shares	171,370
Options outstanding, weighted average price (per share) | CAD / shares		11.50
Options outstanding, weighted average remaining contractual life	7 months 22 days
Options outstanding, intrinsic value | $	$ 0.00
Options exercisable, quantity (in shares) | shares	171,370
Options exercisable, weighted average price (per share) | CAD / shares		11.50
Options exercisable, weighted average remaining contractual life	7 months 22 days
Exercisable options, intrinsic value | $	$ 0.00
Canada, Dollars | $10.00 to $14.99 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, weighted average price (per share) | CAD / shares		10.00
Options exercisable, weighted average price (per share) | CAD / shares		10.00
Canada, Dollars | $10.00 to $14.99 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, weighted average price (per share) | CAD / shares		14.99
Options exercisable, weighted average price (per share) | CAD / shares		14.99
Canada, Dollars | $15.00 to $19.99
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, quantity (in shares) | shares	62,900
Options outstanding, weighted average price (per share) | CAD / shares		15.50
Options outstanding, weighted average remaining contractual life	2 months 5 days
Options outstanding, intrinsic value | $	$ 0.00
Options exercisable, quantity (in shares) | shares	62,900
Options exercisable, weighted average price (per share) | CAD / shares		15.50
Options exercisable, weighted average remaining contractual life	2 months 5 days
Exercisable options, intrinsic value | $	$ 0.00
Canada, Dollars | $15.00 to $19.99 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, weighted average price (per share) | CAD / shares		15.00
Options exercisable, weighted average price (per share) | CAD / shares		15.00
Canada, Dollars | $15.00 to $19.99 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, weighted average price (per share) | CAD / shares		19.99
Options exercisable, weighted average price (per share) | CAD / shares		CAD 19.99
United States of America, Dollars
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, quantity (in shares) | shares	1,389,023
Options outstanding, intrinsic value | $	$ 0.00
Options exercisable, quantity (in shares) | shares	1,188,595
Exercisable options, intrinsic value | $	$ 0.00
United States of America, Dollars | $0.00 to $4.99
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, quantity (in shares) | shares	876,987,000
Options outstanding, weighted average price (per share) | $ / shares	$ 3,470.00
Options outstanding, weighted average remaining contractual life	5 years 4 months 6 days
Options outstanding, intrinsic value | $	$ 0.00
Options exercisable, quantity (in shares) | shares	676,559,000
Options exercisable, weighted average price (per share) | $ / shares	$ 3,800.00
Options exercisable, weighted average remaining contractual life	5 years 9 months 3 days
Exercisable options, intrinsic value | $	$ 0.00
United States of America, Dollars | $0.00 to $4.99 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, weighted average price (per share) | $ / shares	$ 0.00
Options exercisable, weighted average price (per share) | $ / shares	0.00
United States of America, Dollars | $0.00 to $4.99 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, weighted average price (per share) | $ / shares	4.99
Options exercisable, weighted average price (per share) | $ / shares	$ 4.99
United States of America, Dollars | $5.00 to $9.99
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, quantity (in shares) | shares	370,512,000
Options outstanding, weighted average price (per share) | $ / shares	$ 6,130.00
Options outstanding, weighted average remaining contractual life	3 years 8 months 11 days
Options outstanding, intrinsic value | $	$ 0.00
Options exercisable, quantity (in shares) | shares	370,512,000
Options exercisable, weighted average price (per share) | $ / shares	$ 6,130.00
Options exercisable, weighted average remaining contractual life	3 years 8 months 11 days
Exercisable options, intrinsic value | $	$ 0.00
United States of America, Dollars | $5.00 to $9.99 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, weighted average price (per share) | $ / shares	$ 5.00
Options exercisable, weighted average price (per share) | $ / shares	5.00
United States of America, Dollars | $5.00 to $9.99 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, weighted average price (per share) | $ / shares	9.99
Options exercisable, weighted average price (per share) | $ / shares	$ 9.99
United States of America, Dollars | $10.00 to $14.99
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, quantity (in shares) | shares	127,499,000
Options outstanding, weighted average price (per share) | $ / shares	$ 10,680.00
Options outstanding, weighted average remaining contractual life	1 year 2 months 20 days
Options outstanding, intrinsic value | $	$ 0.00
Options exercisable, quantity (in shares) | shares	127,499,000
Options exercisable, weighted average price (per share) | $ / shares	$ 10,680.00
Options exercisable, weighted average remaining contractual life	1 year 2 months 20 days
Exercisable options, intrinsic value | $	$ 0.00
United States of America, Dollars | $10.00 to $14.99 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, weighted average price (per share) | $ / shares	$ 10.00
Options exercisable, weighted average price (per share) | $ / shares	10.00
United States of America, Dollars | $10.00 to $14.99 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, weighted average price (per share) | $ / shares	14.99
Options exercisable, weighted average price (per share) | $ / shares	$ 14.99
United States of America, Dollars | $15.00 to $19.99
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, quantity (in shares) | shares	14,025,000
Options outstanding, weighted average price (per share) | $ / shares	$ 15,610.00
Options outstanding, weighted average remaining contractual life	4 years 9 days
Options outstanding, intrinsic value | $	$ 0.00
Options exercisable, quantity (in shares) | shares	14,025,000
Options exercisable, weighted average price (per share) | $ / shares	$ 15,610.00
Options exercisable, weighted average remaining contractual life	4 years 9 days
Exercisable options, intrinsic value | $	$ 0.00
United States of America, Dollars | $15.00 to $19.99 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, weighted average price (per share) | $ / shares	$ 15.00
Options exercisable, weighted average price (per share) | $ / shares	15.00
United States of America, Dollars | $15.00 to $19.99 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, weighted average price (per share) | $ / shares	19.99
Options exercisable, weighted average price (per share) | $ / shares	$ 19.99

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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