Summary of Significant Accounting Policies - Effect of 606 Adoption on Statements of Operations (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
|
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||
| Net Revenue | $ 208,743 | $ 184,538 |
| Cost of goods sold | 137,502 | 105,243 |
| Advertising and marketing | 8,870 | 7,322 |
| Selling expense | 7,387 | 8,112 |
| Income tax expense | 6,519 | $ 9,980 |
| Calculated under Revenue Guidance in Effect before Topic 606 | ||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||
| Net Revenue | 207,897 | |
| Cost of goods sold | 137,017 | |
| Advertising and marketing | 8,866 | |
| Selling expense | 7,372 | |
| Income tax expense | 6,447 | |
| Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09 | ||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||
| Net Revenue | (846) | |
| Cost of goods sold | (485) | |
| Advertising and marketing | (4) | |
| Selling expense | (15) | |
| Income tax expense | $ (72) | |