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Schedule II Valuation And Qualifying Accounts
 12 Months Ended
Apr. 25, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II Valuation And Qualifying Accounts
SCHEDULE II
VALUATION AND QUALIFYING ACCOUNTS
PATTERSON COMPANIES, INC.
(In thousands) 
Balance at
Beginning
of Period		Charged to
Costs and
Expenses		Charged
to Other
Accounts		DeductionsBalance at
End of
Period
Year ended April 25, 2020
Deducted from asset accounts:
Allowance for doubtful accounts$6,772  $2,008  $—  $3,657  $5,123  
LIFO inventory adjustment$91,342  $8,384  $—  $—  $99,726  
Inventory obsolescence reserve10,099  27,405  —  11,978  25,526  
Total inventory reserve$101,441  $35,789  $—  $11,978  $125,252  
Year ended April 27, 2019
Deducted from asset accounts:
Allowance for doubtful accounts$9,537  $7,333  $—  $10,098  $6,772  
LIFO inventory adjustment$82,105  $9,237  $—  $—  $91,342  
Inventory obsolescence reserve5,376  30,995  —  26,272  10,099  
Total inventory reserve$87,481  $40,232  $—  $26,272  $101,441  
Year ended April 28, 2018
Deducted from asset accounts:
Allowance for doubtful accounts$9,342  $6,280  $—  $6,085  $9,537  
LIFO inventory adjustment$77,816  $4,289  $—  $—  $82,105  
Inventory obsolescence reserve5,621  22,919  —  23,164  5,376  
Total inventory reserve$83,437  $27,208  $—  $23,164  $87,481