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FAIR VALUE MEASUREMENT (Tables)

12 Months Ended

Dec. 31, 2016

FAIR VALUE MEASUREMENT

Schedule of financial assets and liabilities measured at fair value on a recurring basis

		Fair Value Measurements Using
At December 31, 2016		Total Fair Value and Carrying Value on the Balance Sheets			Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
		$			$			$			$
Assets:
Foreign exchange forward contracts			10,632			—			10,632			—
Commodity hedge			4,230			—			4,230			—
Interest rate swap			12,854			—			12,854			—

Total assets			27,716			—			27,716			—


Liabilities:						—						—
Interest rate swap			5,418			—			5,418			—
Warrants			711			—			711			—
Foreign exchange forward contracts			3,496			—			3,496			—

Total liabilities			9,625			—			9,625			—

		Fair Value Measurements Using
At December 31, 2015		Total Fair Value and Carrying Value on the Balance Sheets			Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
		$			$			$			$
Assets:
Foreign exchange forward contracts			1,924			—			1,924			—
Commodity hedge			2,072			—			2,072			—
Interest rate swaption			4,335			—			4,335			—

Total assets			8,331			—			8,331			—


Liabilities:
Interest rate swap			21,546			—			21,546			—
Warrants			25,265			—			25,265			—
Foreign exchange forward contracts			5,775			—			5,775			—

Total liabilities			52,586			—			52,586			—

Schedule of fair value of derivative instruments on the consolidated balance sheets

		Fair Value of Derivative Assets
		At December 31, 2015					At December 31, 2016
		Balance Sheet Location		Fair Value			Balance Sheet Location		Fair Value
				$					$
Foreign exchange forward contracts		Derivative assets—current			1,924		Derivative assets—current			10,632
Commodity hedge		Derivative assets—current			—		Derivative assets—current			1,638
Interest rate swaption		Derivative assets—current			4,335		Derivative assets—current			—
Commodity hedge		Derivative assets—non-current			2,072		Derivative assets—non-current			2,592
Interest rate swap		Derivative assets—non-current			—		Derivative assets—non-current			12,854

		Total			8,331		Total			27,716

		Fair Value of Derivative Liabilities
		At December 31, 2015					At December 31, 2016
		Balance Sheet Location		Fair Value			Balance Sheet Location		Fair Value
				$					$
Foreign exchange forward contracts		Derivative liabilities—current			5,775		Derivative liabilities—current			3,496
Warrants		Derivative liabilities—current			25,265		Derivative liabilities—current			711
Interest rate swap		Derivative liabilities—current			4,188		Derivative liabilities—current			5,418
Interest rate swap		Derivative liabilities—non-current			17,358		Derivative liabilities—non-current			—

		Total			52,586		Total			9,625

Schedule of effect of derivative instruments on consolidated statements of operations

				Amount of Gain (Loss) Recognized in Statements of Operations
				Years Ended December 31
		Location of Gain (Loss) Recognized in Statements of Operations		Years Ended December 31
				2014			2015			2016
				$			$			$
Foreign exchange forward contracts		Gain (loss) on change in fair value of derivatives			19,656			(3,738	)		4,798
Warrants		Gain (loss) on change in fair value of derivatives			—			(8,887	)		24,554
Commodity hedge		Gain (loss) on change in fair value of derivatives			—			(7	)		75
Interest rate swaption		Gain (loss) on change in fair value of derivatives			—			(107	)		(4,335	)
Interest rate swap		Gain (loss) on change in fair value of derivatives			—			543			2,230

		Total			19,656			(12,196	)		27,322