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Receivables and Allowance for Doubtful Accounts Receivables and Allowance for Doubtful Accounts (Tables)
 12 Months Ended
Dec. 31, 2017
Receivables and Allowance for Doubtful Accounts [Abstract]  
Receivables [Table Text Block]
Receivables consist of the following:
 
December 31,
(In thousands)
2017
 
2016
Installment sales receivable
$
55,516

 
$
55,834

Trade and notes receivables
18,474

 
14,067

Other receivables
—

 
3,477

Total receivables
73,990

 
73,378

Less allowance for doubtful accounts
(4,167
)
 
(3,593
)
Total receivables, net of allowance for doubtful accounts
$
69,823

 
$
69,785
Changes in allowance for doubtful accounts [Table Text Block]
Changes in our allowance for doubtful accounts are as follows: 
 
Year Ended December 31,
(In thousands)
2017
 
2016
 
2015
Beginning allowance for doubtful accounts
$
3,593

 
$
3,614

 
$
4,023

Bad debt expense
15,702

 
15,449

 
15,260

Accounts written off
(15,791
)
 
(16,095
)
 
(16,317
)
Recoveries
663

 
625

 
648

 Ending allowance for doubtful accounts
$
4,167

 
$
3,593

 
$
3,614