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Stock-Based Compensation (Tables)
 9 Months Ended
May 31, 2019
Share-based Payment Arrangement [Abstract]  
Recognized stock-based compensation expense within selling, general and administrative expense
The Company recognized stock-based compensation expense within selling, general and administrative expense as follows (in thousands):
 
Three months ended
 
Nine months ended
 
May 31, 2019
 
May 31, 2018
 
May 31, 2019
 
May 31, 2018
Restricted stock units and stock appreciation rights
$
12,592

 
$
13,457

 
$
41,247

 
$
69,916

Employee stock purchase plan
1,914

 
1,581

 
6,205

 
5,368

Other(1)
—

 
—

 
—

 
7,538

Total
$
14,506

 
$
15,038

 
$
47,452

 
$
82,822

 
(1) 
Represents a one-time cash-settled stock award that vested on November 30, 2017.
Share-based compensation information
The following represents the stock-based compensation information for the period indicated (in thousands):
 
Nine months ended
 
May 31, 2019
Unrecognized stock-based compensation expense—restricted stock units
$
53,987

Remaining weighted-average period for restricted stock units expense
1.4 years
Schedule of common stock shares outstanding
The following represents the common stock outstanding for the periods indicated:
 
Three months ended
 
Nine months ended
 
May 31, 2019
 
May 31, 2018
 
May 31, 2019
 
May 31, 2018
Common stock outstanding:
 
 
 
 
 
 
 
Beginning balances
152,878,329

 
172,063,230

 
164,588,172

 
177,727,653

Shares issued upon exercise of stock options
—

 
—

 
11,348

 
29,688

Shares issued under employee stock purchase plan
(215
)
 
261

 
692,110

 
575,777

Vesting of restricted stock
73,095

 
24,232

 
1,979,022

 
2,718,379

Purchases of treasury stock under employee stock plans
(24,322
)
 
(6,567
)
 
(489,158
)
 
(790,598
)
Treasury shares purchased(1)
—

 
(3,281,412
)
 
(13,854,607
)
 
(11,461,155
)
Ending balances
152,926,887

 
168,799,744

 
152,926,887

 
168,799,744


 
(1) 
In June 2018, the Company’s Board of Directors authorized the repurchase of up to $350.0 million of the Company’s common stock (the “2018 Share Repurchase Program”). The 2018 Share Repurchase Program expires August 31, 2019. As of May 31, 2019, the total amount authorized by the Board of Directors had been repurchased.