Stockholders' Equity and Stock-Based Compensation (Tables)

12 Months Ended

Dec. 30, 2017

Stockholders' Equity and Stock-Based Compensation [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity

A summary of all stock option activity as of December 30, 2017 and changes during the year ended is as follows:

	Number of shares		Weighted-avg. exercise price per share		Weighted-avg. remaining contractual life
Options outstanding at January 3, 2015	696,176		$	13.88	6.2 years
Granted	422,386		14.76
Exercised	(131,653	)	4.13
Forfeited	(136,177	)	16.68
Expired	—		—
Options outstanding at January 2, 2016	850,732		15.38		7.7 years
Granted	1,547,184		9.53
Exercised	(28,000	)	6.71
Forfeited	(4,000	)	16.20
Expired	—		—
Options outstanding at December 31, 2016	2,365,916		11.65		8.4 years
Granted	956,809		12.29
Exercised	(27,968	)	8.51
Forfeited	(4,000	)	13.55
Expired	—		—
Options outstanding at December 30, 2017	3,290,757		$	11.86	7.3 years
Options exercisable at December 30, 2017	1,516,605		$	12.90	5.9 years

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The fair value of each stock option grant under the LTIPs was estimated on the date of grant using the Black Scholes option-pricing model with the following weighted average assumptions and results for fiscal 2017, 2016 and 2015.

Weighted Average	2017	2016	2015
Expected dividend yield	0.0%	0.0%	0.0%
Risk-free interest rate	2.00%	1.35%	1.82%
Expected term	5.82 years	5.76 years	5.75 years
Expected volatility	33.4%	34.4%	38.0%
Fair value of options granted	$4.34	$3.34	$5.59

Schedule of Nonvested Share Activity

A summary of the Company’s non-vested stock, restricted stock unit and performance share unit awards as of December 30, 2017, and changes during the year ended is as follows:

	Non-Vested, RSU and PSU Shares		Weighted Average Grant Date Fair Value
Stock awards outstanding January 3, 2015	1,257,173		$	19.98
Shares granted	524,225		14.47
Shares vested	(714,626	)	17.91
Shares forfeited	(32,581	)	19.65
Stock awards outstanding January 2, 2016	1,034,191		18.63
Shares granted	602,306		12.11
Shares vested	(413,654	)	15.11
Shares forfeited	(241,582	)	20.86
Stock awards outstanding December 31, 2016	981,261		15.56
Shares granted	104,750		12.27
Shares vested	(486,086	)	13.98
Shares forfeited	(239,581	)	20.90
Stock awards outstanding December 30, 2017	360,344		$	13.18

Schedule of Share-based Payment Award, Equity Instruments Other than Options, Valuation Assumptions

The fair value of each 2017 LTIP and 2016 LTIP PSU award under the Company's 2017 LTIP and 2016 LTIP was estimated on the date of grant using a Monte Carlo model with the following weighted average assumptions for fiscal 2017 and fiscal 2016, except for the illiquidity discount, which only pertains to the 2017 LTIP and 2016 LTIP PSU's with a holding period requirement.

Weighted Average	2017	2016
Expected dividend yield	0.0%	0.0%
Risk-free interest rate	1.40%	0.80%
Expected term	2.89 years	2.62 years
Expected volatility	32.7%	29.3%
Illiquidity discount	14.0%	16.1%

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity

A summary of the Company’s non-employee director restricted stock awards as of December 30, 2017, and changes during the year ended is as follows:

	Restricted stock and Restricted Stock Unit Shares		Weighted Average Grant Date Fair Value
Stock awards outstanding January 3, 2015	155,916		$	12.22
Restricted shares granted	46,910		13.80
Restricted shares where the restriction lapsed	(50,322	)	12.25
Restricted shares forfeited	—		—
Stock awards outstanding January 2, 2016	152,504		12.69
Restricted shares granted	43,421		14.51
Restricted shares where the restriction lapsed	(81,031	)	11.55
Restricted shares forfeited	(3,535	)	14.51
Stock awards outstanding December 31, 2016	111,359		14.18
Restricted shares granted	60,575		15.63
Restricted shares where the restriction lapsed	(14,915	)	12.42
Restricted shares forfeited	(2,210	)	14.51
Stock awards outstanding December 30, 2017	154,809		$	14.91

Schedule of Other Share-based Compensation, Activity [Table Text Block]

A summary of the Company’s 2017 and 2016 LTIP PSU awards as of December 30, 2017, and changes during the year ended is as follows:

	LTIP PSU Shares		Weighted Average Grant Date Fair Value
LTIP PSU awards outstanding January 2, 2016	—		$	—
Granted	664,120		7.17
Vested	—		—
Forfeited	—		—
LTIP PSU awards outstanding December 31, 2016	664,120		$	7.17
Granted	559,388		11.14
Vested	—		—
Forfeited	(82,492	)	9.99
LTIP PSU awards outstanding December 30, 2017	1,141,016		$	8.91