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RECENT ACCOUNTING PRONOUNCEMENTS (Narrative) (Details) - USD ($)
$ in Thousands
Oct. 02, 2021
Jul. 03, 2021
Apr. 03, 2021
Sep. 26, 2020
Jun. 27, 2020
Mar. 28, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Stockholders' Equity Attributable to Parent $ 698,549 $ 677,080 $ 731,670 $ 667,923 $ 608,569 $ 587,109
Deferred tax liability (24,574)   (43,825)      
Additional Paid-in Capital            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Stockholders' Equity Attributable to Parent 558,156 551,108 602,727 568,748 562,729 553,229
Retained Earnings            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Stockholders' Equity Attributable to Parent $ 169,418 $ 154,562 157,981 $ 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