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Schedule II - Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2013
Valuation and Qualifying Accounts [Abstract]  
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Description
 
Balance at beginning of year
 
Provisions
 
Deductions from reserves
 
Balance at end of year
Year ended December 31, 2015
 
 
 
 
 
 
 
 
Allowance for doubtful accounts and billing adjustments
 
$
4,404

 
10,486

 
(8,208
)
 
$
6,682

Workers’ compensation loss reserves
 
$
15,564

 
2,117

 
(2,661
)
 
$
15,020

 
 
 
 
 
 
 
 
 
Year ended December 31, 2014
 
 
 
 
 
 
 
 
Allowance for doubtful accounts and billing adjustments
 
$
2,465

 
6,680

 
(4,741
)
 
$
4,404

Workers’ compensation loss reserves
 
$
17,123

 
2,211

 
(3,770
)
 
$
15,564

 
 
 

 
 

 
 

 
 

Year ended December 31, 2013
 
 

 
 

 
 

 
 

Allowance for doubtful accounts and billing adjustments
 
$
3,395

 
1,474

 
(2,404
)
 
$
2,465

Workers’ compensation loss reserves
 
$
17,037

 
5,850

 
(5,764
)
 
$
17,123