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Share-Based Compensation - Options Outstanding and Exercisable (Details) - 2006 Incentive Plan - Options - $ / shares	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Options Outstanding
Number Outstanding (in shares)	945,083
Weighted-Average Remaining Contractual Life (years)	4 years 1 month 2 days
Weighted-Average Exercise Price (in dollars per share)	$ 22.95
Options Exercisable
Number Exercisable (in shares)	577,963
Weighted-Average Remaining Contractual Life (years)	3 years 3 months 4 days
Weighted-Average Exercise Price (in dollars per share)	$ 22.18
Options, Number of Shares
Non-vested balance at the beginning of the period (in shares)	505,264
Granted (in shares)	32,000
Vested (in shares)	(170,144)
Non-vested balance at the end of the period (in shares)	367,120	505,264
Options, Weighted-Average Fair Value
Non-vested balance at the beginning of the period (in dollars per share)	$ 8.75
Granted (in dollars per share)	9.93	$ 7.37	$ 12.24
Vested (in dollars per share)	8.74
Non-vested balance at the end of the period (in dollars per share)	8.86	$ 8.75
$16.12 - 21.48
Share-based compensation
Exercise price, low end of range (in dollars per share)	16.12
Exercise price, high end of range (in dollars per share)	$ 21.48
Options Outstanding
Number Outstanding (in shares)	324,259
Weighted-Average Remaining Contractual Life (years)	3 years 1 month 21 days
Weighted-Average Exercise Price (in dollars per share)	$ 19.20
Options Exercisable
Number Exercisable (in shares)	263,086
Weighted-Average Remaining Contractual Life (years)	2 years 11 months 19 days
Weighted-Average Exercise Price (in dollars per share)	$ 19.36
$21.49 - 26.86
Share-based compensation
Exercise price, low end of range (in dollars per share)	21.49
Exercise price, high end of range (in dollars per share)	$ 26.86
Options Outstanding
Number Outstanding (in shares)	408,809
Weighted-Average Remaining Contractual Life (years)	4 years 3 months 4 days
Weighted-Average Exercise Price (in dollars per share)	$ 21.75
Options Exercisable
Number Exercisable (in shares)	224,890
Weighted-Average Remaining Contractual Life (years)	2 years 11 months 9 days
Weighted-Average Exercise Price (in dollars per share)	$ 21.94
$26.87 - 32.23
Share-based compensation
Exercise price, low end of range (in dollars per share)	26.87
Exercise price, high end of range (in dollars per share)	$ 32.23
Options Outstanding
Number Outstanding (in shares)	212,015
Weighted-Average Remaining Contractual Life (years)	5 years 2 months 12 days
Weighted-Average Exercise Price (in dollars per share)	$ 30.98
Options Exercisable
Number Exercisable (in shares)	89,987
Weighted-Average Remaining Contractual Life (years)	4 years 10 months 21 days
Weighted-Average Exercise Price (in dollars per share)	$ 30.98

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Net number of share options (or share units) granted during the period.

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