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Goodwill (Details Textual)	12 Months Ended
	Dec. 31, 2017
Intangible assets and goodwill [Line Items]
Growth rate used to extrapolate cash flow projections	3.00%
Explanation of period over which management has projected cash flows	5 year
Bottom of range [member]
Intangible assets and goodwill [Line Items]
Discount rate applied to cash flow projections	9.20%
Top of range [member]
Intangible assets and goodwill [Line Items]
Discount rate applied to cash flow projections	10.90%

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The discount rate applied to cash flow projections for a cash-generating unit (group of units). [Refer: Cash-generating units [member]]

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The growth rate used to extrapolate cash flow projections beyond the period covered by the most recent budgets/forecasts for a cash-generating unit (group of units). [Refer: Cash-generating units [member]]

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The explanation of the period over which management has projected cash flows based on financial budgets/forecasts approved by management including, when a period greater than five years is used for a cash-generating unit (group of units), an explanation of why that longer period is justified. [Refer: Cash-generating units [member]]

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