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Schedule II - Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2012
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, 2012
 
 
 
 
 
 
 
 
Allowance for doubtful accounts and billing adjustments
 
$
2,777

 
(166
)
 
1,359

 
$
3,970

Workers’ compensation and medical malpractice loss reserves
 
$
10,401

 
3,594

 
(3,668
)
 
$
10,327

 
 
 
 
 
 
 
 
 
Year ended December 31, 2011
 
 
 
 
 
 
 
 
Allowance for doubtful accounts and billing adjustments
 
$
2,175

 
1,127

 
(525
)
 
$
2,777

Workers’ compensation and medical malpractice loss reserves
 
$
10,244

 
2,339

 
(2,182
)
 
$
10,401

 
 
 

 
 

 
 

 
 

Year ended December 31, 2010
 
 

 
 

 
 

 
 

Allowance for doubtful accounts and billing adjustments
 
$
1,949

 
644

 
(418
)
 
$
2,175

Workers’ compensation and medical malpractice loss reserves
 
$
10,349

 
4,310

 
(4,415
)
 
$
10,244