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Schedule II - Valuation and Qualifying Accounts and Reserves
 12 Months Ended
May 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Valuation and Qualifying Accounts and Reserves
Schedule II — Valuation and Qualifying Accounts and Reserves
(In thousands)
Balance at
Beginning of Year
 

Additions (1)
 

Deductions (2)
 
Balance at
End of Year
 
 
 
 
 
 
 
 
Allowance for Doubtful Accounts
 
 
 
 
 
 
 
May 31, 2016
$
15,497

 
$
8,274

 
$
4,668

 
$
19,103

May 31, 2017
$
19,103

 
$
6,446

 
$
5,024

 
$
20,525

May 31, 2018
$
20,525

 
$
13,358

 
$
373

 
$
33,510

 
 
 
 
 
 
 
 
Reserve for Obsolete Inventory
 
 
 
 
 
 
 
May 31, 2016
$
30,531

 
$
5,195

 
$
3,010

 
$
32,716

May 31, 2017
$
32,716

 
$
10,049

 
$
4,460

 
$
38,305

May 31, 2018
$
38,305

 
$
1,335

 
$
2,597

 
$
37,043


(1) 
Represents amounts charged to expense to increase reserve for estimated future bad debts or to increase reserve for obsolete inventory. Amounts related to inventory are computed by performing a thorough analysis of future marketability by specific inventory item as well as an estimate based on Cintas' historical rates of obsolescence.

(2) 
Represents reductions in the balance sheet reserve due to the actual write-off of non-collectible accounts receivable or the physical disposal of obsolete inventory items. These amounts do not impact Cintas' consolidated income statement.