Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Revenues
Revenues	$ 217,106	$ 190,098	$ 422,490	$ 369,126
Revenue from performance obligations	15,400		22,700
Distributors
Revenues
Revenues	154,032	135,795	304,303	261,539
Direct customers
Revenues
Revenues	63,074	54,303	118,187	107,587
Internet of Things
Revenues
Revenues	116,023	97,727	219,114	185,575
Infrastructure
Revenues
Revenues	51,520	38,221	100,940	74,202
Broadcast
Revenues
Revenues	34,172	36,655	70,237	73,982
Access
Revenues
Revenues	$ 15,391	$ 17,495	$ 32,199	$ 35,367