XML 54 R31.htm IDEA: XBRL DOCUMENT v3.3.0.814
Schedule II Valuation and Qualifying Accounts (Notes)
 12 Months Ended
Dec. 31, 2014
Valuation and Qualifying Accounts [Abstract]  
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
 
Balance at beginning of year
 
Additions
 
Deductions
 
Balance at
end of year
Year ended December 31, 2014
 
 
 
 
 
 
 
Allowance for doubtful accounts
$
24,872

 
13,420

 
15,281

 
$
23,011

 
 
 
 
 
 
 
 
Year ended December 31, 2013
 
 
 
 
 
 
 
Allowance for doubtful accounts
$
27,854

 
13,411

 
16,393

 
$
24,872

 
 
 
 
 
 
 
 
Year ended December 31, 2012
 
 
 
 
 
 
 
Allowance for doubtful accounts
$
22,128

 
13,597

 
7,871

 
$
27,854