BALANCE SHEET COMPONENTS (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Accounts receivable, net:
Accounts receivable	$ 240,213		$ 156,525
Less: allowance for unearned DPA	(9,900)		(5,400)
Less: allowance for doubtful accounts	(440)		(500)
Accounts receivable, net	229,873		150,625
Inventories:
Raw materials	14,018		19,391
Work-in-process	39,744		39,425
Finished goods	44,268		45,565
Inventories	98,030		104,381
Property and equipment, net:
Property and equipment, gross	286,964		266,438
Less: Accumulated depreciation and amortization	(173,396)		(161,104)
Property and equipment, net	113,568		105,334
Deferred taxes and other long-term assets:
Right of use assets	72,451
Deferred tax assets	36,506		50,660
Severance assets	5,776		17,043
Other assets	44,289		50,479
Deferred taxes and other long-term assets	159,022	$ 187,284	118,182
Accrued liabilities:
Payroll and related expenses	95,904		76,788
Accrued expenses	41,601		28,821
Lease liability, current	19,821
Other	39,201		16,269
Accrued liabilities	196,527	138,496	121,878
Other long-term liabilities:
Lease liability, long-term	60,933
Income tax payable	30,194		25,600
Accrued severance	7,019		21,645
Other	11,500		6,868
Other long-term liabilities	109,646	$ 106,597	54,113
Computer, equipment, and software
Property and equipment, net:
Property and equipment, gross	227,725		191,130
Furniture and fixtures
Property and equipment, net:
Property and equipment, gross	2,063		25,358
Leasehold improvements
Property and equipment, net:
Property and equipment, gross	$ 57,176		$ 49,950