INCOME TAXES: ADDITIONAL INFORMATION (Details) $ in Thousands						3 Months Ended		12 Months Ended
	Dec. 29, 2016	Dec. 28, 2016	Jan. 05, 2016	Jan. 04, 2016	Dec. 31, 2015	Mar. 31, 2017 USD ($) subsidiary	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Unrecognized tax benefits						$ 42,000		$ 41,500
Unrecognized tax benefits, income tax penalties and interest accrued						2,000		1,800
Income tax expense						$ (1,632)	$ 2,360
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Effective income tax rate reconciliation, percent						11.80%	(49.10%)
Effective income tax rate reconciliation, at federal statutory income tax rate, percent						35.00%
Israel Tax Authority [Member]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Effective income tax rate reconciliation corporate income tax rate	24.00%	25.00%	25.00%	26.50%	26.50%	25.00%
Effective income tax rate reconciliation, expected corporate income tax rate						23.00%
Israel Tax Authority [Member] | Israel Tax Authority [Member]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Number of subsidiaries | subsidiary						1
Israel Tax Authority [Member] | Minimum [Member]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Open tax year						2011
Israel Tax Authority [Member] | Maximum [Member]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Open tax year						2014
Tax Authority Foreign and Domestic [Member] | Minimum [Member]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Open tax year						2013
Tax Authority Foreign and Domestic [Member] | Maximum [Member]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Open tax year						2016
Domestic Tax Authority [Member] | Minimum [Member]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Open tax year						2002
Denmark and Israel [Member] | Minimum [Member]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Open tax year						2011
Denmark and Israel [Member] | Maximum [Member]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Open tax year						2016
Yokneam [Member] | Israel Tax Authority [Member]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Tax holiday inception date						2011
Tel Aviv [Member] | Israel Tax Authority [Member]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Tax holiday inception date						2013
Income tax holiday reduced income tax rate after second year of tax holiday						10.00%
Tel Aviv [Member] | Maximum [Member] | Israel Tax Authority [Member]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Income tax holiday, termination date						2021
Unfavorable Regulatory Action [Member]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Effective income tax rate reconciliation, change in enacted tax rate, amount							$ (1,300)	(1,400)
Income tax expense							$ 1,300	$ 1,400
EZchip [Member]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Deferred tax assets, net						$ 900