Net Income Per Share (Details 1) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	13,584	21,918
2011 Warrants and 2013 Warrants
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	6,830	7,815
Options to purchase shares of common stock
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	6,754	14,070
Non-vested shares of restricted stock
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	0	33