Segment Information (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Summary of revenue by product type
Revenue by type, Total	$ 133,996	$ 95,544	$ 266,831	$ 180,366
Video processing products [Member]
Summary of revenue by product type
Revenue by type, Total	51,225	49,998	115,283	88,888
Production and playout products [Member]
Summary of revenue by product type
Revenue by type, Total	25,453		46,386
Edge and access products [Member]
Summary of revenue by product type
Revenue by type, Total	40,178	34,263	71,354	69,807
Service and support [Member]
Summary of revenue by product type
Revenue by type, Total	$ 16,840	$ 11,283	$ 33,808	$ 21,671