Share-Based Compensation - Options Outstanding and Exercisable (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Options Outstanding
Number Outstanding (in shares)	1,206,778
Weighted-Average Remaining Contractual Life	3 years 11 months 23 days
Weighted-Average Exercise Price (in dollars per share)	$ 26.36
Options Exercisable
Number Exercisable (in shares)	701,514
Weighted-Average Exercise Price (in dollars per share)	$ 28.53
Weighted-Average Remaining Contractual Life	2 years 5 months 12 days
Non-vested Options, Number of Shares
Balance at the beginning of the period (in shares)	417,185
Granted (in shares)	250,835
Vested (in shares)	(156,737)
Forfeited (in shares)	(6,019)
Balance at the end of the period (in shares)	505,264	417,185
Non-vested Options, Weighted-Average Fair Value
Balance at the beginning of the period (in dollars per share)	$ 9.98
Granted (in dollars per share)	7.48
Vested (in dollars per share)	9.57
Forfeited (in dollars per share)	11.61
Balance at the end of the period (in dollars per share)	$ 8.75	$ 9.98
Options
Options Exercisable
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value	$ 1.5	$ 1.4	$ 1.3
Non-vested Options, Weighted-Average Fair Value
Granted (in dollars per share)		$ 12.24	$ 7.77
$18.48
Options Outstanding
Number Outstanding (in shares)	244,625
Weighted-Average Remaining Contractual Life	4 years 10 months 17 days
Weighted-Average Exercise Price (in dollars per share)	$ 18.48	$ 18.48
Options Exercisable
Number Exercisable (in shares)	122,296
Weighted-Average Exercise Price (in dollars per share)	$ 18.48
Weighted-Average Remaining Contractual Life	4 years 10 months 17 days
$18.49 - 22.81
Share-based compensation
Exercise price, low end of range (in dollars per share)	$ 18.49
Exercise price, high end of range (in dollars per share)	$ 22.81
Options Outstanding
Number Outstanding (in shares)	539,238
Weighted-Average Remaining Contractual Life	4 years 5 months 5 days
Weighted-Average Exercise Price (in dollars per share)	$ 21.61
Options Exercisable
Number Exercisable (in shares)	294,029
Weighted-Average Exercise Price (in dollars per share)	$ 21.68
Weighted-Average Remaining Contractual Life	2 years 4 months 28 days
$22.82 - 29.07
Share-based compensation
Exercise price, low end of range (in dollars per share)	$ 22.82
Exercise price, high end of range (in dollars per share)	$ 29.07
Options Outstanding
Number Outstanding (in shares)	80,400
Weighted-Average Remaining Contractual Life	1 year 7 days
Weighted-Average Exercise Price (in dollars per share)	$ 24.23
Options Exercisable
Number Exercisable (in shares)	78,400
Weighted-Average Exercise Price (in dollars per share)	$ 24.21
Weighted-Average Remaining Contractual Life	11 months 12 days
$29.08 - 32.26
Share-based compensation
Exercise price, low end of range (in dollars per share)	$ 29.08
Exercise price, high end of range (in dollars per share)	$ 32.26
Options Outstanding
Number Outstanding (in shares)	180,015
Weighted-Average Remaining Contractual Life	5 years 10 months 24 days
Weighted-Average Exercise Price (in dollars per share)	$ 30.98
Options Exercisable
Number Exercisable (in shares)	44,289
Weighted-Average Exercise Price (in dollars per share)	$ 30.97
Weighted-Average Remaining Contractual Life	5 years 10 months 20 days
$32.27 - 48.85
Share-based compensation
Exercise price, low end of range (in dollars per share)	$ 32.27
Exercise price, high end of range (in dollars per share)	$ 48.85
Options Outstanding
Number Outstanding (in shares)	12,500
Weighted-Average Remaining Contractual Life	26 days
Weighted-Average Exercise Price (in dollars per share)	$ 48.85
Options Exercisable
Number Exercisable (in shares)	12,500
Weighted-Average Exercise Price (in dollars per share)	$ 48.85
Weighted-Average Remaining Contractual Life	25 days
$48.86 - 50.00
Share-based compensation
Exercise price, low end of range (in dollars per share)	$ 48.86
Exercise price, high end of range (in dollars per share)	$ 50.00
Options Outstanding
Number Outstanding (in shares)	150,000
Weighted-Average Remaining Contractual Life	6 months 4 days
Weighted-Average Exercise Price (in dollars per share)	$ 50.00
Options Exercisable
Number Exercisable (in shares)	150,000
Weighted-Average Exercise Price (in dollars per share)	$ 50.00
Weighted-Average Remaining Contractual Life	6 months 4 days
$50.01 - 53.72
Share-based compensation
Exercise price, low end of range (in dollars per share)	$ 50.01
Exercise price, high end of range (in dollars per share)	$ 53.72
$50.01 - 53.72
Options Exercisable
Weighted-Average Remaining Contractual Life	0 days