Net Income Per Share (Details 1) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	1,058	2,439	922	1,953
Long-term performance-based stock awards
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	225	1,141	229	888
Options to purchase shares of common stock
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	820	1,279	606	1,014
Non-vested shares of restricted stock
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	13	19	87	51