Equity Compensation (Details 5) (USD $)	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012	Jan. 28, 2015
Equity Compensation
Dividends declared to holders of time-based restricted stock (in dollars per share)				$ 0.14
Award vesting period, in years	3 years
Restricted Stock
Shares
Restricted Shares, Beginning Balance	423,000	536,000	500,000
Restricted Shares, Granted	106,000	160,000	266,000
Restricted Shares, Forfeited	(40,000)	(70,000)	(74,000)
Restricted Shares, Vested	(203,000)	(203,000)	(156,000)
Restricted Shares, Ending Balance	286,000	423,000	536,000
Weighted Average Grant Date Fair Value
Weighted Average Grant-Date Fair Value, Beginning Balance (in dollars per share)	20.39	$ 16.31	$ 14.10
Weighted Average Grant-Date Fair Value, Granted (in dollars per share)	49.31	$ 27.09	$ 18.59
Weighted Average Grant-Date Fair Value, Forfeited (in dollars per share)	27.79	$ 18.56	$ 15.46
Weighted Average Grant-Date Fair Value, Vested (in dollars per share)	18.05	$ 15.51	$ 13.89
Weighted Average Grant-Date Fair Value, Ending Balance (in dollars per share)	31.81	$ 20.39	$ 16.31
Time based restricted stock
Equity Compensation
Dividends declared to holders of time-based restricted stock (in dollars)	128,000	$ 86,000
Dividends declared to holders of time-based restricted stock (in dollars per share)	0.53	$ 0.25
Award vesting period, in years	3 years	3 years	3 years
Performance based restricted stock units | Executive Management
Equity Compensation
Award vesting period, in years	3 years	3 years	3 years
Shares
Restricted Shares, Granted	17,000	3,000	108,000