Net Income Per Share (Details 1) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Potential shares of Cadence's common stock excluded
Potential common shares excluded from the computation of diluted earnings per share	550	2,011	1,191	1,302
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	40	1,386	713	807
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	506	596	376	419
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	4	29	102	76