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Notes Receivable (Tables)
 12 Months Ended
Dec. 31, 2017
Receivables  
Schedule of Notes Receivable
At December 31, notes receivable consisted of the following (in thousands):
 
December 31,
 
2017
 
2016
Independent contractor notes receivable
$
28,634

 
$
46,831

Other notes receivable
8,489

 
5,189

 
37,123

 
52,020

Less current portion
11,127

 
14,590

Notes receivable – non-current
$
25,996

 
$
37,430
Student Loan [Member]  
Receivables  
Schedule of Notes Receivable
At December 31, student notes receivable consisted of the following (in thousands):
 
December 31,
 
2017
 
2016
Student notes receivable
$
48,121

 
$
34,097

Allowance for doubtful student notes receivable
(21,026
)
 
(15,682
)
Total student notes receivable, net of allowance
27,095

 
18,415

Less current portion, net of allowance
6,326

 
7,350

Student notes receivable – non-current portion
$
20,769

 
$
11,065