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DIVESTITURE - Narrative (Details) - Donhad $ in Thousands, $ in Thousands			12 Months Ended
	Apr. 30, 2018 AUD ($)	Apr. 30, 2018 USD ($)	Dec. 30, 2017 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax loss			$ 913
Disposed by sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture	$ 82,500	$ 62,518
Pre-tax gain from divestiture, before recognition of currency translation loss		4,334
Recognition of cumulative currency translation loss and hedges (out of OCI)		$ 10,418