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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 01, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Assumptions Used to Value Employee Stock Purchase Rights
The expected term of ESPP shares is the average of the remaining purchase periods under each offering period. The assumptions used to value employee stock purchase rights were as follows:
 
2017
 
2016
 
2015
Expected life (in years)
0.5 - 2.0
 
0.5 - 2.0
 
0.5 - 2.0
Volatility
22% - 27%
 
26% - 29%
 
26% - 30%
Risk free interest rate
0.62% - 1.41%
 
0.37% - 1.06%
 
0.11% - 0.67%
 
Restricted Stock Unit Activity
Restricted stock unit activity for fiscal 2017, 2016 and 2015 was as follows (in thousands):
 
2017
 
2016
 
2015
Beginning outstanding balance
8,316

 
10,069

 
13,564

Awarded
5,018

 
4,440

 
4,012

Released
(3,859
)
 
(5,471
)
 
(6,561
)
Forfeited
(766
)
 
(722
)
 
(946
)
Increase due to acquisition
595

 
—

 
—

Ending outstanding balance
9,304

 
8,316

 
10,069
Restricted Stock Units Outstanding
Information regarding restricted stock units outstanding at December 1, 2017, December 2, 2016 and November 27, 2015 is summarized below:
 
Number of
Shares
(thousands)
 
Weighted
Average
Remaining
Contractual
Life
(years)
 
Aggregate
Intrinsic
Value(*)
(millions)
2017
 
 
 
 
 
Restricted stock units outstanding
9,304

 
1.11
 
$
1,670.2

Restricted stock units vested and expected to vest
8,608

 
1.05
 
$
1,545.3

2016
 

 
 
 
 

Restricted stock units outstanding
8,316

 
1.11
 
$
829.4

Restricted stock units vested and expected to vest
7,613

 
1.04
 
$
759.3

2015
 
 
 
 
 
Restricted stock units outstanding
10,069

 
0.93
 
$
928.0

Restricted stock units vested and expected to vest
9,267

 
0.86
 
$
842.9

_________________________________________ 
(*) 
The intrinsic value is calculated as the market value as of the end of the fiscal period. As reported by the NASDAQ Global Select Market, the market values as of December 1, 2017, December 2, 2016 and November 27, 2015 were $179.52, $99.73 and $92.17, respectively.
Performance Share Activity

Performance share activity for fiscal 2017, 2016 and 2015 was as follows (in thousands): 
 
2017
 
2016
 
2015
 
Shares
Granted
 
Maximum
Shares Eligible
to Receive
 
Shares
Granted
 
Maximum
Shares Eligible
to Receive
 
Shares
Granted
 
Maximum
Shares Eligible
to Receive
Beginning outstanding balance
1,630

 
3,261

 
1,940

 
3,881

 
1,517

 
3,034

Awarded
1,082

(1) 
1,040

 
1,206

(2) 
1,053

 
671

 
1,342

Achieved
(1,135
)
(3) 
(1,147
)
 
(1,373
)
(3) 
(1,387
)
 
—

 
—

Forfeited
(43
)
 
(86
)
 
(143
)
 
(286
)
 
(248
)
 
(495
)
Ending outstanding balance
1,534

 
3,068

 
1,630

 
3,261

 
1,940

 
3,881


_________________________________________ 
(1) 
Included in the 1.1 million shares awarded during fiscal 2017 were 0.6 million additional shares awarded for the final achievement of the 2014 Performance Share program. The remaining awarded shares were for the 2017 Performance Share Program.
(2) 
Included in the 1.2 million shares awarded during fiscal 2016 were 0.7 million additional shares awarded for the final achievement of the 2013 Performance Share program. The remaining awarded shares were for the 2016 Performance Share Program.
(3) 
Shares achieved under our 2014 and 2013 Performance Share programs which resulted from 198% achievement of target for both programs.
Restricted Stock Units Granted to Directors
Restricted stock units granted to directors for fiscal 2017, 2016 and 2015 were as follows (in thousands):
 
2017
 
2016
 
2015
Restricted stock units granted to existing directors
18

 
25

 
41
Total Stock-Based Compensation Costs
Total stock-based compensation costs that have been included in our Consolidated Statements of Income for fiscal 2017, 2016 and 2015 were as follows (in thousands):
 
  Income Statement Classifications
 
Cost of
Revenue–
Subscription
 
Cost of
Revenue–
Services and Support
 
Research and Development
 
Sales and
Marketing
 
General and Administrative
 
 
Total(1)
Option Grants and Stock
Purchase Rights
 
 
 
 
 
 
 
 
 
 
 
2017
$
180

 
$
6,661

 
$
20,126

 
$
18,592

 
$
4,973

 
$
50,532

2016
$
1,474

 
$
5,514

 
$
13,932

 
$
16,534

 
$
4,371

 
$
41,825

2015
$
1,449

 
$
5,185

 
$
14,082

 
$
18,360

 
$
4,790

 
$
43,866

Restricted Stock Units and Performance
Share Awards
 

 
 

 
 

 
 

 
 

 
 

2017
$
16,792

 
$
9,602

 
$
161,366

 
$
139,047

 
$
77,133

 
$
403,940

2016
$
6,632

 
$
7,522

 
$
109,249

 
$
113,757

 
$
70,312

 
$
307,472

2015
$
6,481

 
$
6,446

 
$
104,624

 
$
109,908

 
$
66,709

 
$
294,168

_________________________________________ 
(1) 
During fiscal 2017, 2016 and 2015, we recorded tax benefits of $153.2 million, $71.7 million and $68.8 million, respectively.