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Schedule II - Valuation and Qualifying Accoutns
 12 Months Ended
Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]  
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
BIO-RAD LABORATORIES, INC.
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
Years Ended December 31, 2019, 2018, and 2017
(in thousands)

Allowance for doubtful accounts receivable
 
 
Balance at
Beginning
of Year
 

(Credited) Charged to Costs
and Expenses
 
Deductions
 
Balance at
End of Year
2019
 
$
26,713

 
$
(1,240
)
 
$
(5,268
)
 
$
20,205

2018
 
$
25,549

 
$
11,527

 
$
(10,363
)
 
$
26,713

2017
 
$
23,367

 
$
11,174

 
$
(8,992
)
 
$
25,549



Valuation allowance for long-term deferred tax assets
 
 
Balance at
Beginning
of Year
 
Charged
(Credited) to Income
Tax Expense
 
Deductions
 
Balance at 
End of Year 
2019
 
$
70,769

 
$
—

 
$
(3,579
)
 
$
67,190

2018
 
$
66,356

 
$
4,413

 
$
—

 
$
70,769

2017
 
$
66,403

 
$
(47
)
 
$
—

 
$
66,356