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EARNINGS PER SHARE (Reconciliation of the shares used in the basic and diluted net income per share computation) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Jun. 29, 2019	Jun. 30, 2018
NUMERATOR:
Net income/(loss)	$ 1,287	$ (3,555)	$ 7,517	$ 60,256	$ 36,313	$ (69,528)	$ 5,249	$ 27,041
DENOMINATOR:
Weighted average shares outstanding - Basic (in shares)	64,683			69,125			65,914	70,019
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units	$ 748			$ 1,177			$ 683	$ 1,094
Weighted average shares outstanding - Diluted	65,431			70,302			66,597	71,113
EPS:
Net income per share - Basic (in dollars per share)	$ 0.02			$ 0.87			$ 0.08	$ 0.39
Effect of dilutive shares (in dollars per share)	0			0.01			0	0.01
Net income per share - Diluted (in dollars per share)	$ 0.02			$ 0.86			$ 0.08	$ 0.38

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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