Unaudited Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2014 |
Sep. 30, 2014 |
Jun. 30, 2014 |
Mar. 31, 2014 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Quarterly Financial Information Disclosure [Abstract] | |||||||||||
| 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 |
| Gross profit | 111,217 | 108,285 | 99,795 | 99,534 | 91,313 | 94,226 | 84,993 | 96,335 | 418,831 | 366,867 | 297,612 |
| Selling, General and Administrative Expense | 60,993 | 58,664 | 59,660 | 47,399 | 53,623 | 45,419 | 46,100 | 42,722 | 226,716 | 187,864 | 138,986 |
| Operating Income (Loss) | 18,224 | 49,621 | 40,135 | 52,135 | 37,690 | 48,807 | 38,893 | 53,613 | 160,115 | 179,003 | 158,626 |
| Net income | $ 9,638 | $ 27,066 | $ 22,638 | $ 30,046 | $ 21,154 | $ 27,713 | $ 21,911 | $ 31,153 | $ 89,388 | $ 101,931 | $ 78,236 |
| Basic net income per share | $ 0.05 | $ 0.14 | $ 0.12 | $ 0.15 | $ 0.11 | $ 0.14 | $ 0.11 | $ 0.16 | $ 0.46 | $ 0.52 | $ 0.40 |
| Diluted net income per share | $ 0.05 | $ 0.14 | $ 0.11 | $ 0.15 | $ 0.11 | $ 0.14 | $ 0.11 | $ 0.16 | $ 0.45 | $ 0.52 | $ 0.40 |
| Basic weighted average shares | 196,173,169 | 196,062,348 | 195,747,954 | 195,745,670 | 195,743,154 | 195,743,154 | 195,733,692 | 195,720,894 | 195,933,800 | 195,735,309 | 195,619,943 |
| Diluted weighted average shares | 198,076,031 | 198,254,808 | 197,709,082 | 197,773,850 | 197,853,482 | 197,884,029 | 197,827,833 | 197,747,579 | 198,047,453 | 197,852,932 | 196,559,084 |