The amount of acquisition-related costs recognised as an expense for transactions that are recognised separately from the acquisition of assets and the assumption of liabilities in business combinations. [Refer: Business combinations [member]]

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The amount of contingent liabilities recognised in a business combination. [Refer: Contingent liabilities [member]; Business combinations [member]]

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The percentage of voting equity interests acquired in a business combination. [Refer: Business combinations [member]]

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The proportion of the voting rights in a subsidiary held by non-controlling interests. [Refer: Subsidiaries [member]; Non-controlling interests]

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Escrow Deposit1

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BUSINESS ACQUISITIONS AND GOODWILL - Narrative (Details) - USD ($) $ in Millions		12 Months Ended
	Sep. 16, 2016	Dec. 31, 2017	Dec. 31, 2016
Cantech Acquisition
Disclosure of detailed information about business combination [line items]
Escrow deposit		$ 10.5
Contingent liabilities recognised in business combination		0.0
Cantech Acquisition \| Selling, general and administrative expense
Disclosure of detailed information about business combination [line items]
Acquisition-related costs		1.7
Powerband Acquisition
Disclosure of detailed information about business combination [line items]
Percentage of voting equity interests acquired	74.00%
Percentage of non-controlling interest in acquiree recognised at acquisition date	26.00%
Contingent liabilities recognised in business combination		$ 0.0
Powerband Acquisition \| Selling, general and administrative expense
Disclosure of detailed information about business combination [line items]
Acquisition-related costs			$ 1.3