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Schedule II - Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2017
Valuation and Qualifying Accounts [Abstract]  
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
 
 
 
 
Additions
 
 
 
 
Description
 
Balance at beginning of year
 
Charged to costs and expenses
 
Charged to other accounts(1)
 
Deductions(2)
 
Balance at end of year
Year ended December 31, 2017
 
 
 
 
 
 
 
 
 
 
Allowance for doubtful accounts and billing adjustments
 
$
8,093

 
5,251

 
6,799

 
(10,234
)
 
$
9,909

Workers’ compensation loss reserves
 
$
15,784

 
2,908

 
—

 
(3,915
)
 
$
14,777

 
 
 
 
 
 
 
 
 
 
 
Year ended December 31, 2016
 
 
 
 
 
 
 
 
 
 
Allowance for doubtful accounts and billing adjustments
 
$
6,682

 
2,881

 
7,907

 
(9,377
)
 
$
8,093

Workers’ compensation loss reserves
 
$
15,020

 
2,693

 
—

 
(1,929
)
 
$
15,784

 
 
 

 
 
 
 
 
 

 
 

Year ended December 31, 2015
 
 

 
 
 
 
 
 

 
 

Allowance for doubtful accounts and billing adjustments
 
$
4,404

 
2,196

 
8,290

 
(8,208
)
 
$
6,682

Workers’ compensation loss reserves
 
$
15,564

 
2,117

 
—

 
(2,661
)
 
$
15,020


______
(1) Charges to other accounts include the provision for permanent placement fallouts and billing adjustments that have been deducted from revenues in the accompanying consolidated statements of operations and comprehensive income.

(2) Deductions from the allowance for doubtful accounts and billing adjustments include write-offs of uncollectible accounts receivable and permanent placements fallouts that have been charged against the allowance for doubtful accounts and billing adjustments. Deductions from workers’ compensation loss reserves include payments of claims and changes related to anticipated insurance and indemnification recoveries which have corresponding changes in the workers' compensation receivable balance in the accompanying consolidated balance sheets.