Net Income Per Share (Details 1) - shares shares in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Potential shares of Cadence's common stock excluded
Potential common shares excluded from the computation of diluted earnings per share	1,830	592
Long-term performance-based stock awards
Potential shares of Cadence's common stock excluded
Potential common shares excluded from the computation of diluted earnings per share	1,386	228
Options to purchase shares of common stock
Potential shares of Cadence's common stock excluded
Potential common shares excluded from the computation of diluted earnings per share	245	242
Non-vested shares of restricted stock
Potential shares of Cadence's common stock excluded
Potential common shares excluded from the computation of diluted earnings per share	199	122