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Stock-Based Compensation (Tables)
 12 Months Ended
Sep. 29, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock-Based Compensation Expense By Type Of Award
Stock-based compensation expense recognized in the Consolidated Statements of Income is as follows:
 
 
2018
 
2017
 
2016
Stock-based compensation expense by type of award
 
 

 
 

 
 

Employee stock options
 
$
1,849

 
$
1,588

 
$
2,436

Employee stock purchase plan
 
283

 
298

 
519

Restricted stock units, performance restricted stock units and restricted stock
 
5,112

 
3,737

 
4,203

Amounts capitalized as inventory
 
(1,799
)
 
(1,444
)
 
(2,354
)
Amounts recognized in income for amounts previously capitalized as inventory
 
1,838

 
1,421

 
2,420

Total stock-based compensation included in income from operations
 
7,283

 
5,600

 
7,224

Income tax benefit on stock-based compensation
 
(1,763
)
 
(1,893
)
 
(2,421
)
Net stock-based compensation expense included in net income
 
$
5,520

 
$
3,707

 
$
4,803
Assumptions Used To Determine Fair Value Of Stock Options Granted
The weighted average assumptions used to determine fair value of stock options granted are as follows:
 
 
2018
 
2017
 
2016
Expected life (in years)
 
4.0

 
4.0

 
4.1

Risk-free interest rate
 
2.6
%
 
1.6
%
 
1.5
%
Expected volatility
 
29.4
%
 
29.2
%
 
26.7
%
Dividend yield
 
2.3
%
 
2.6
%
 
2.0
%
Schedule Of Stock Options Activity
Stock option activity is as follows:
 
 
2018
 
2017
 
2016
 
 
Shares
 
WAEP1
 
Shares
 
WAEP1
 
Shares
 
WAEP1
Options outstanding at beginning of year
 
766

 
$
57.86

 
784

 
$
60.34

 
687

 
$
58.17

Granted
 
245

 
$
52.30

 
288

 
$
46.35

 
316

 
$
61.57

Exercised
 
(19
)
 
$
47.26

 
(112
)
 
$
40.68

 
(68
)
 
$
41.10

Forfeited or expired
 
(111
)
 
$
57.64

 
(194
)
 
$
60.74

 
(151
)
 
$
61.74

Options outstanding at end of year
 
881

 
$
56.57

 
766

 
$
57.86

 
784

 
$
60.34

Options eligible for exercise at year end
 
443

 
$
61.61

 
329

 
$
64.52

 
331

 
$
56.23

1 
Weighted Average Exercise Price
Schedule Of Restricted Stock Grants And Unit Activity
Restricted stock activity is as follows:
 
 
2018
 
2017
 
2016
 
 
Shares
 
WAGDFV2
 
Shares
 
WAGDFV2
 
Shares
 
WAGDFV2
Unvested shares at beginning of year
 
—

 
$
—

 
—

 
$
—

 
3

 
$
57.01

Granted
 
—

 
$
—

 
—

 
$
—

 
—

 
$
—

Vested and released
 
—

 
$
—

 
—

 
$
—

 
(3
)
 
$
57.01

Forfeited
 
—

 
$
—

 
—

 
$
—

 
—

 
$
—

Unvested shares at end of year
 
—

 
$
—

 
—

 
$
—

 
—

 
$
—

2  
Weighted Average Grant Date Fair Value per share 
Restricted stock unit and performance restricted stock unit activity are as follows:
 
 
2018
 
2017
 
2016
 
 
Shares
 
WAGDFV3
 
Shares
 
WAGDFV3
 
Shares
 
WAGDFV3
Outstanding at beginning of year
 
223

 
$
49.95

 
165

 
$
58.98

 
119

 
$
64.77

Granted
 
140

 
$
49.67

 
157

 
$
45.05

 
114

 
$
55.84

Vested and released
 
(75
)
 
$
52.45

 
(68
)
 
$
59.07

 
(47
)
 
$
64.69

Forfeited
 
(21
)
 
$
48.96

 
(31
)
 
$
53.08

 
(21
)
 
$
62.15

Outstanding at end of year
 
267

 
$
48.99

 
223

 
$
49.95

 
165

 
$
58.98

3 
Weighted Average Grant Date Fair Value per share