Net Income Per Share (Details 1) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	18,401	78,684	84,212
2015 Warrants
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	0	46,382	46,382
2011 Warrants and 2013 Warrants
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	6,830	13,922	13,922
Options to purchase shares of common stock
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	11,501	17,580	22,100
Non-vested shares of restricted stock
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	70	800	1,808