v3.3.1.900
SHARE-BASED COMPENSATION: (Tables)
 12 Months Ended
Nov. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of share-based compensation expense
The Company recorded share-based compensation expense in the consolidated statements of operations for fiscal years 2015, 2014 and 2013 as follows: 
 
Fiscal Years Ended November 30,
 
2015
 
2014
 
2013
Cost of revenue
$
571

 
$
646

 
$
—

Selling, general and administrative expenses
13,133

 
13,430

 
9,174

Total share-based compensation
13,704

 
14,076

 
9,174

Tax effect on share-based compensation
(4,967
)
 
(5,156
)
 
(3,304
)
Net effect on net income
$
8,737

 
$
8,920

 
$
5,870
Schedule of assumptions used in Black-Scholes valuation model
The following assumptions were used in the Black-Scholes valuation model in fiscal years 2015, 2014 and 2013: 
 
Fiscal Years Ended November 30,
 
2015
 
2014
 
2013
Stock option plan:
 
 
 
 
 
Expected life (years)
5.9

 
5.5

 
5.6

Risk free interest rate
1.63
%
 
1.74
%
 
1.61
%
Expected volatility
31.78
%
 
33.40
%
 
38.71
%
Dividend yield
0.90
%
 
0.80
%
 
0.00
%
Employee stock purchase plan:

 

 

Expected life (years)
0.3

 
0.3

 
0.3

Risk free interest rate
0.00% - 0.03%

 
0.02% - 0.07%

 
0.02
%
Expected volatility
29.68% - 38.63%

 
28.39% - 37.40%

 
27.96
%
Dividend yield
0.16% - 0.24%

 
0.00% - 0.02%

 
0.00
%
Schedule of activity under stock option plans
A summary of the activities under the Company’s stock option plan is set forth below:
 
Shares Available
for Grant
 
Options Outstanding
Number of
Shares
 
Weighted-Average
Exercise Price
Per Share
Balances, November 30, 2014
2,146

 
750

 
$34.17
Restricted stock awards granted
(157
)
 
—

 
—
Restricted stock units granted
(30
)
 
—

 
—
Restricted stock cancelled/forfeited
86

 
—

 
—
Options granted
(78
)
 
78

 
$89.21
Options exercised
—

 
(170
)
 
$23.38
Options cancelled/forfeited/expired
1

 
(1
)
 
$17.17
Balances, November 30, 2015
1,968

 
657

 
$43.50
Schedule of cash received from exercise of options and intrinsic values of options exercised
The cash received from the exercise of options and the intrinsic values of options exercised during fiscal years 2015, 2014 and 2013 were as follows:
 
Fiscal Years Ended November 30,
 
2015
 
2014
 
2013
Intrinsic value of options exercised
$
9,338

 
$
11,500

 
$
10,749

Cash received from exercise of options
3,984

 
5,873

 
7,163
Schedule of non-vested restricted stock awards and stock units
A summary of the changes in the Company's nonvested restricted stock awards and stock units during the fiscal year 2015 is presented below:
 
Number of
shares
 
Weighted-average,
grant-date
fair value per share
Nonvested as of November 30, 2014
921
 
$45.33
Awards granted
157
 
$87.44
Units granted
30
 
$84.57
Awards and units vested
(303)
 
$41.25
Awards and units cancelled/forfeited
(86)
 
$48.31
Nonvested as of November 30, 2015
719
 
$58.36