Summary of Significant Accounting Policies (Details)
$ in Thousands |
3 Months Ended |
12 Months Ended |
|
Dec. 31, 2015
USD ($)
|
Sep. 30, 2015
USD ($)
|
Jun. 30, 2015
USD ($)
|
Mar. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
Sep. 30, 2014
USD ($)
|
Jun. 30, 2014
USD ($)
|
Mar. 31, 2014
USD ($)
|
Dec. 31, 2013
USD ($)
|
Dec. 31, 2015
USD ($)
customer
segment
|
Dec. 31, 2014
USD ($)
customer
segment
|
Dec. 31, 2013
USD ($)
|
| Class of Stock [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Net sales |
$ 265,238
|
$ 259,437
|
$ 253,998
|
$ 248,774
|
$ 238,089
|
$ 234,770
|
$ 218,654
|
$ 226,247
|
|
$ 1,027,447
|
$ 917,760
|
$ 719,509
|
| Write off of Deferred Debt Issuance Cost |
|
|
|
|
|
|
|
|
$ 9,200
|
|
|
|
| Amortization of Deferred Charges |
|
|
|
|
|
|
|
|
|
$ 100
|
$ 100
|
$ 1,600
|
| Vendor Concentration |
|
|
|
|
|
|
|
|
|
44.00%
|
68.00%
|
69.00%
|
| Advertising Expense |
|
|
|
|
|
|
|
|
|
$ 83,600
|
$ 81,100
|
$ 57,700
|
| Research and Development Expense |
|
|
|
|
|
|
|
|
|
9,500
|
7,600
|
4,600
|
| Interest Paid |
|
|
|
|
|
|
|
|
|
15,000
|
15,700
|
20,000
|
| Income Taxes Paid |
|
|
|
|
|
|
|
|
|
54,900
|
60,400
|
50,400
|
| Amortization of debt issuance costs and accretion of original issue discount |
|
|
|
|
|
|
|
|
|
122
|
122
|
$ 2,511
|
| Restricted Cash and Cash Equivalents |
500
|
|
|
|
500
|
|
|
|
|
500
|
500
|
|
| Trade receivables, net |
66,648
|
|
|
|
54,647
|
|
|
|
|
66,648
|
54,647
|
|
| Other receivables |
13,455
|
|
|
|
23,973
|
|
|
|
|
13,455
|
23,973
|
|
| Total |
80,103
|
|
|
|
78,620
|
|
|
|
|
$ 80,103
|
$ 78,620
|
|
| Number of Customers Exceeding Threshold | customer |
|
|
|
|
|
|
|
|
|
2
|
2
|
|
| Number of Reportable Segments | segment |
|
|
|
|
|
|
|
|
|
1
|
1
|
|
| Common stock |
|
|
|
|
|
|
|
|
|
|
|
|
| Class of Stock [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Stockholders' Equity Note, Stock Split, Conversion Ratio |
|
|
|
|
|
|
|
|
|
4.2
|
|
|
| Credit Concentration Risk [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
| Class of Stock [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
|
69.00%
|
72.00%
|
|
| Customer One [Member] | Customer Concentration Risk [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
| Class of Stock [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
|
46.00%
|
49.00%
|
53.00%
|
| Customer Two [Member] | Customer Concentration Risk [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
| Class of Stock [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
|
24.00%
|
24.00%
|
22.00%
|
| Reimbursement Receivable [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
| Class of Stock [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Reimbursement receivables |
3,500
|
|
|
|
4,400
|
|
|
|
|
$ 3,500
|
$ 4,400
|
|
| Taxes Receivable [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
| Class of Stock [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Reimbursement receivables |
$ 9,500
|
|
|
|
$ 18,200
|
|
|
|
|
9,500
|
18,200
|
|
| Geographic Distribution, Domestic [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
| Class of Stock [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Net sales |
|
|
|
|
|
|
|
|
|
990,500
|
881,900
|
$ 694,400
|
| Geographic Distribution, Foreign [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
| Class of Stock [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Net sales |
|
|
|
|
|
|
|
|
|
$ 36,900
|
$ 35,900
|
$ 25,100
|