Net Income Per Share (Details 1) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	1,677	1,089	2,791
Long-term performance-based awards
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	1,069	0	0
Options to purchase shares of common stock
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	581	1,029	2,773
Non-vested shares of restricted stock
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	27	60	18