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Schedule II (Notes)
 12 Months Ended
Dec. 31, 2015
Valuation and Qualifying Accounts [Abstract]  
Schedule of Valuation and Qualifying Accounts
VALUATION AND QUALIFYING ACCOUNTS
For the years ended December 31, 2015, 2014 and 2013

(in thousands)
Balance at Beginning of Year
 
Charges to Revenue
 
Charges to Expense
 
Deductions/Write-offs
 
Balance at End of Year
Allowance for doubtful accounts receivable:
 
 
 
 
 
 
 
 
 
Year ended December 31, 2015
$
1,250

 
$
—

 
$
682

 
$
(532
)
 
$
1,400

Year ended December 31, 2014
520

 
—

 
970

 
(240
)
 
1,250

Year ended December 31, 2013
262

 
—

 
663

 
(405
)
 
520

Allowance for sales returns:
 
 
 
 
 
 
 
 
 
Year ended December 31, 2015
$
25,747

 
$
48,182

 
$
(47,649
)
 
$
—

 
$
26,280

Year ended December 31, 2014
14,352

 
39,011

 
(27,616
)
 
—

 
25,747

Year ended December 31, 2013
9,077

 
24,156

 
(18,881
)
 
—

 
14,352

Valuation allowance for deferred tax assets:
 
 
 
 
 
 
 
 
 
Year ended December 31, 2015
$
—

 
$
—

 
$
8,555

 
$
—

 
$
8,555