| Schedule of Segment Reporting Information, by Segment [Table Text Block] |
| | | | | | | | | | | | | | | | | Net sales: | | | | | | | | | | | | | | Biotechnology | | $ | 421,536 | | | $ | 364,504 | | | $ | 317,340 | | | Protein Platforms | | | 111,885 | | | | 91,464 | | | | 77,324 | | | Diagnostics | | | 110,108 | | | | 107,139 | | | | 104,484 | | | Intersegment | | | (536 | ) | | | (104 | ) | | | (125 | ) | | Consolidated net sales | | $ | 642,993 | | | $ | 563,003 | | | $ | 499,023 | | | | | | | | | | | | | | | | | Operating Income: | | | | | | | | | | | | | | Biotechnology | | $ | 199,100 | | | $ | 175,163 | | | $ | 168,613 | | | Protein Platforms | | | 17,996 | | | | 9,648 | | | | 3,592 | | | Diagnostics | | | 28,280 | | | | 28,575 | | | | 30,412 | | | Segment operating income | | | 245,376 | | | | 213,386 | | | | 202,617 | | | Costs recognized upon sale of acquired inventory | | | (2,455 | ) | | | (3,037 | ) | | | (5,431 | ) | | Amortization of intangibles | | | (46,983 | ) | | | (44,393 | ) | | | (29,395 | ) | | Acquisition related expenses | | | (24,429 | ) | | | (25,789 | ) | | | (2,761 | ) | | Restructuring costs | | | (376 | ) | | | - | | | | - | | | Stock-based compensation | | | (28,240 | ) | | | (14,631 | ) | | | (9,430 | ) | | Corporate general, selling and administrative expenses | | | (6,715 | ) | | | (4,952 | ) | | | (5,007 | ) | | Consolidated operating income | | $ | 136,178 | | | $ | 120,584 | | | $ | 150,593 | | |
| Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] |
| | | | | | | | | | | | | | | | | Net sales: | | | | | | | | | | | | | | United States | | $ | 346,293 | | | $ | 313,195 | | | $ | 275,859 | | | EMEA, excluding U.K. | | | 148,599 | | | | 125,126 | | | | 103,060 | | | U.K. | | | 33,704 | | | | 28,401 | | | | 28,307 | | | APAC, excluding Greater China | | | 48,392 | | | | 41,463 | | | | 38,137 | | | Greater China | | | 47,950 | | | | 39,078 | | | | 36,199 | | | Rest of world | | | 18,055 | | | | 15,740 | | | | 17,461 | | | Total external sales | | $ | 642,993 | | | $ | 563,003 | | | $ | 499,023 | | | | | | | | | | | | | | | | | Long-lived assets: | | | | | | | | | | | | | | United States and Canada | | $ | 129,360 | | | $ | 119,859 | | | $ | 116,830 | | | Europe | | | 14,597 | | | | 14,100 | | | | 14,423 | | | China | | | 1,391 | | | | 1,165 | | | | 1,109 | | | Total long-lived assets | | $ | 145,348 | | | $ | 135,124 | | | $ | 132,362 | | | | | | | | | Long-lived assets: | | | | | | | | | | United States and Canada | | $ | 129,360 | | | $ | 119,859 | | | Europe | | | 14,597 | | | | 14,100 | | | China | | | 1,391 | | | | 1,165 | | | Total long-lived assets | | $ | 145,348 | | | $ | 135,124 | | | Intangible assets: | | | | | | | | | | United States and Canada | | $ | 417,430 | | | $ | 424,579 | | | Europe | | | 21,386 | | | | 18,710 | | | China | | | 7,516 | | | | 8,753 | | | Total intangible assets | | $ | 446,332 | | | $ | 452,042 | | |