LEASES (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Sep. 28, 2019 USD ($)	Sep. 28, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Renewal term	10 years	10 years
Operating lease right-of-use assets in Other long-term assets	$ 19,356	$ 19,356
Operating lease liabilities in Other current liabilities	4,966	4,966
Operating lease liabilities in Other long-term liabilities	$ 14,051	$ 14,051
Weighted-average remaining lease term (years)	4 years 9 months 18 days	4 years 9 months 18 days
Weighted-average discount rate	5.27%	5.27%
Operating lease cost	$ 2,100	$ 4,600
Operating cash flows used for operating leases	1,783	3,834
2020 (excluding the first half of 2020)	3,003	3,003
2021	5,746	5,746
2022	4,210	4,210
2023	3,284	3,284
2024	1,853	1,853
Thereafter	3,534	3,534
Total future minimum operating lease payments	21,630	21,630
Less: imputed interest	(2,613)	(2,613)
Present value of operating lease liabilities	$ 19,017	$ 19,017
Minimum
Lessee, Lease, Description [Line Items]
Lease term	1 year	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease term	30 years	30 years
Office Space
Lessee, Lease, Description [Line Items]
Lease term	22 years	22 years
Present value of operating lease liabilities	$ 98,600	$ 98,600
Operating lease revenue
Lessee, Lease, Description [Line Items]
Concentration risk		3.00%