| Schedule of Segment Reporting Information, by Segment [Table Text Block] |
| | | | | | | | | | | | | | | | | Net sales: | | | | | | | | | | | | | | Protein Sciences | | $ | 543,159 | | | $ | 482,378 | | | $ | 419,365 | | | Diagnostics and Genomics | | | 171,674 | | | | 161,151 | | | | 143,742 | | | Intersegment | | | (827 | ) | | | (536 | ) | | | (104 | ) | | Consolidated net sales | | $ | 714,006 | | | $ | 642,993 | | | $ | 563,003 | | | | | | | | | | | | | | | | | Operating Income: | | | | | | | | | | | | | | Protein Sciences | | $ | 240,919 | | | $ | 209,880 | | | $ | 184,095 | | | Diagnostics and Genomics | | | 10,079 | | | | 35,496 | | | | 29,291 | | | Segment operating income | | | 250,998 | | | | 245,376 | | | | 213,386 | | | Costs recognized upon sale of acquired inventory | | | (3,739 | ) | | | (2,455 | ) | | | (3,037 | ) | | Amortization of acquired intangible assets | | | (58,550 | ) | | | (46,983 | ) | | | (44,393 | ) | | Acquisition related expenses | | | (2,282 | ) | | | (24,429 | ) | | | (25,789 | ) | | Restructuring costs | | | - | | | | (376 | ) | | | - | | | Stock-based compensation | | | (33,057 | ) | | | (28,240 | ) | | | (14,631 | ) | | Corporate general, selling and administrative expenses | | | (6,651 | ) | | | (6,715 | ) | | | (4,952 | ) | | Consolidated operating income | | $ | 146,719 | | | $ | 136,178 | | | $ | 120,584 | | | | | | | | | | | | | | | | | | | Consumables revenue - Protein Sciences | | $ | 430,655 | | | $ | 384,350 | | | $ | 341,611 | | | Consumables revenue - Diagnostics and Genomics | | | 158,324 | | | | 150,388 | | | | 134,930 | | | Total consumable revenue | | $ | 588,979 | | | $ | 534,738 | | | $ | 476,541 | | | | | | | | Long-lived assets: | |
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| | | United States and Canada | | $ | 138,016 | | | $ | 129,360 | | | Europe | | | 14,439 | | | | 14,597 | | | Asia | | | 1,584 | | | | 1,391 | | | Total long-lived assets | | $ | 154,039 | | | $ | 145,348 | | | Intangible assets: | | | | | | | | | | United States and Canada | | $ | 556,951 | | | $ | 417,430 | | | Europe | | | 16,637 | | | | 21,386 | | | Asia | | | 5,841 | | | | 7,516 | | | Total intangible assets | | $ | 579,429 | | | $ | 446,332 | | |