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Receivables and Allowance for Doubtful Accounts Receivables and Allowance for Doubtful Accounts (Tables)
 6 Months Ended
Jun. 30, 2018
Receivables and Allowance for Doubtful Accounts [Abstract]  
Receivables [Table Text Block]
Receivables consist of the following:
(In thousands)
June 30, 2018
 
December 31, 2017
Installment sales receivable
$
53,112

 
$
55,516

Trade and notes receivables
19,954

 
18,474

Total receivables
73,066

 
73,990

Less allowance for doubtful accounts
(3,388
)
 
(4,167
)
Total receivables, net of allowance for doubtful accounts
$
69,678

 
$
69,823
Changes in allowance for doubtful accounts [Table Text Block]
Changes in our allowance for doubtful accounts are as follows: 
(In thousands)
June 30, 2018
 
December 31, 2017
Beginning allowance for doubtful accounts
$
4,167

 
$
3,593

Bad debt expense
5,846

 
15,702

Accounts written off
(6,959
)
 
(15,791
)
Recoveries
334

 
663

 Ending allowance for doubtful accounts
$
3,388

 
$
4,167