RECENT ACCOUNTING PRONOUNCEMENTS (Narrative) (Details) - USD ($) $ in Thousands	Jan. 01, 2022	Oct. 02, 2021	Jul. 03, 2021	Apr. 03, 2021	Dec. 26, 2020	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' Equity Attributable to Parent	$ 730,775	$ 698,549	$ 677,080	$ 731,670	$ 719,152	$ 667,923	$ 608,569	$ 587,109
Deferred tax liability	(26,132)			(43,825)
Additional Paid-in Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' Equity Attributable to Parent	566,963	558,156	551,108	602,727	579,480	568,748	562,729	553,229
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' Equity Attributable to Parent	$ 192,650	$ 169,418	$ 154,562	157,981	$ 169,022	$ 137,140	$ 89,039	$ 78,512
Accounting Standards Update 2020-06
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred tax liability				20,000
Convertible Notes Payable, Noncurrent				80,300
Accounting Standards Update 2020-06 | Additional Paid-in Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' Equity Attributable to Parent				(61,200)
Accounting Standards Update 2020-06 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' Equity Attributable to Parent				$ 1,000