INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 30, 2017	Dec. 31, 2016	Jun. 30, 2018	Jul. 01, 2017
Investments, Owned, Federal Income Tax Note [Line Items]
Income tax provision	$ 3,176	$ 37	$ 9,413	$ 443
Release of reserve due to lapse in statute of limitations				$ 500
Unrecognized tax benefits	3,500		3,500			$ 3,500
Unrecognized tax benefits that would affect effective tax rate	2,900		2,900
Estimated decrease in unrecognized tax benefits	$ 1,300		1,300
Impact of rate change on gross deferred tax assets			$ (32,400)
Forecast
Investments, Owned, Federal Income Tax Note [Line Items]
Corporate Federal income tax effective rate (percent)					28.00%