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Share-Based Compensation (Tables)

12 Months Ended

Dec. 30, 2017

Share-Based Compensation

Summary of option activity

Options

Weighted Average Exercise Price

Weighted Average Remaining Contractual Term

Aggregate Intrinsic Value

(in thousands)

Outstanding at December 31, 2016

945,083

$

22.95

Fiscal 2017:

Granted

22,757

44.87

Exercised

(293,439

)

21.88

$

5,372

Expired

—

—

Forfeited

(8,684

)

24.58

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Outstanding at December 30, 2017

665,717

24.14

4.00

$

13,851

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Options exercisable at December 30, 2017

456,639

$

22.78

3.39

$

10,123

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Vested or expected to vest at December 30, 2017

663,088

$

24.13

4.00

$

13,802

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Schedule of weighted average assumptions used to estimate the fair market value of the stock options at the date of grant

		2017			2016			2015
Risk-free interest rate			2.1	%		1.3	%		1.4	%
Expected volatility			32	%		36	%		39	%
Expected dividend yield			1.5	%		1.5	%		—
Forfeiture rate			0.4	%		0.5	%		1.1	%
Weighted average expected life (in years)			4.49			4.58			4.50

Summary of options outstanding and options exercisable

Options Outstanding

Options Exercisable

Range of Exercise Prices

Number Outstanding at December 30, 2017

Weighted-Average Remaining Contractual Life (years)

Weighted-Average Exercise Price

Number Exercisable at December 30, 2017

Weighted-Average Remaining Contractual Life (years)

Weighted- Average Exercise Price

$16.12 - 21.48

181,630

2.89

$

18.48

181,630

2.89

$

18.48

$21.49 - 26.86

276,737

4.07

21.60

158,035

3.48

21.66

$26.87 - 32.23

184,593

4.25

30.98

116,974

4.04

30.98

$42.98 - 48.35

22,757

9.97

44.87

—

—

—

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Total

665,717

4.00

$

24.14

456,639

3.39

$

22.78

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Schedule of roll-forward of the outstanding non-vested stock options

		Options
		Number of Shares			Weighted-Average Fair Value
Non-vested at December 31, 2016			367,120		$	8.74
Granted			22,757			11.54
Vested			(172,115	)		8.80
Forfeited			(8,684	)		8.95
​	​	​	​	​	​	​	​
Non-vested at December 30, 2017			209,078		$	8.98
​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​

Schedule of roll-forward of shares of restricted stock

		Shares of Restricted Stock
		Number of Shares			Weighted-Average Fair Value
Non-vested at December 31, 2016			62,122		$	23.64
Granted			16,494			36.36
Vested			(25,891	)		22.93
Forfeited			—			—
​	​	​	​	​	​	​	​
Non-vested at December 30, 2017			52,725		$	27.97
​	​	​	​	​	​	​	​
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Schedule of roll-forward of the time-vesting restricted stock units

		Time-Vesting Restricted Stock Units
		Number of Units			Weighted-Average Fair Value
Non-vested at December 31, 2016			184,751		$	24.18
Granted			25,958			38.38
Vested			(86,547	)		23.27
Forfeited			(4,342	)		24.58
​	​	​	​	​	​	​	​
Non-vested at December 30, 2017			119,820		$	27.90
​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​

Summary of outstanding non-vested performance-vesting restricted stock units

		Performance-Vesting Restricted Stock Units
		Number of Units
Non-vested at January 3, 2015			365,468
Granted			204,315
Vested			—
Forfeited			(11,624	)
​	​	​	​	​
Non-vested at January 2, 2016			558,159
​	​	​	​	​
​	​	​	​	​
Granted			26,666
Vested			(90,485	)
Forfeited			(83,187	)
​	​	​	​	​
Non-vested at December 31, 2016			411,153
​	​	​	​	​
​	​	​	​	​
Granted			32,721
Vested			(98,882	)
Forfeited			(64,397	)
​	​	​	​	​
Non-vested at December 30, 2017			280,595
​	​	​	​	​
​	​	​	​	​

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