ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES - Recently Adopted Accounting Pronouncements Narrative (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Mar. 30, 2019	Dec. 29, 2018
Operating lease right-of-use assets	$ 37,768
Present value of lease liabilities	49,968
Finance lease assets	1,120
Present value of finance lease liabilities	1,135
Decrease to accumulated deficit	(189,545)		$ (240,104)
No. 2016-02
Operating lease right-of-use assets	37,800
Present value of lease liabilities	50,000
Finance lease assets	1,100
Present value of finance lease liabilities	$ 1,100
Revision Of Prior Period Accounting Standards Update Adjustment
Decrease to accumulated deficit		$ 500