Employee Benefit Plans, Stock Option Disclosures (Details) (Stock Option Awards [Member], USD $) Share data in Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 29, 2012		Dec. 31, 2011	Jan. 01, 2011
Stock Option Awards [Member]
Employee Service Share-based Compensation [Line Items]
Award vesting period	stock options vest in three equal annual installments beginning on the first anniversary of the grant date, provided that the recipient remains employed by the Company on the applicable vesting dates
Compensation cost not yet recognized	$ 1,181,000
Compensation cost not yet recognized, period for recognition	1 year 6 months
Fair Value Assumptions [Abstract]
Expected dividend rate (in hundredths)	0.00%		0.00%	0.00%
Weighted-average exercise price (in dollars per share)	$ 21.91		$ 24.90	$ 14.17
Weighted average grant date fair value (in dollars per share)	$ 11.69		$ 12.85	$ 7.39
Volatility (in hundredths)	50.00%		45.00%	45.00%
Risk-free interest rate (in hundredths)	1.38%		2.86%	3.04%
Expected life of options	7 years 7 months 6 days		7 years 4 months 24 days	7 years 6 months
Summary of Stock Option Activity [Roll Forward]
Options outstanding at beginning of year (in shares)	235		161	21
Granted (in shares)	83		82	140
Exercised (in shares)	(18)		(8)
Options outstanding at end of period (in shares)	300		235	161
Vested and unvested expected to vest at end of year (in shares)	300
Options exercisable at end of year (in shares)	116
Weighted Average Exercise Price [Roll Forward]
Options outstanding at beginning of year (in dollars per share)	$ 18.15		$ 14.82	$ 19.13
Granted (in dollars per share)	$ 21.91		$ 24.90	$ 14.17
Exercised (in dollars per share)	$ 17.54		$ 20.01
Options outstanding at end of year (in dollars per share)	$ 19.23		$ 18.15	$ 14.82
Vested and unvested expected to vest at end of year (in dollars per share)	$ 19.23
Options exercisable, end of year (in dollars per share)	$ 16.69
Additional Disclosures [Abstract]
Weighted average remaining contractual life, options outstanding at end of year	8 years
Weighted average remaining contractual life, vested and unvested expected to vest, end of year	8 years
Weighted average remaining contractual life, options exercisable, end of year	7 years 4 months 24 days
Aggregate intrinsic value, options outstanding at end of year	2,109,000	[1]
Aggregate intrinsic value, vested and unvested expected to vest end of year	2,109,000	[1]
Aggregate intrinsic value, options exercisable, end of year	1,111,000	[1]
Share price (in dollars per share)	$ 26.26
Summary of Stock Options Exercised [Abstract]
Total intrinsic value of options exercised	119,000		39,000
Cash received from options exercised	$ 319,000		$ 150,000

[1] The closing price per share on the last trading day prior to December 29, 2012 was $26.26.