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Business Combination (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016
Business Acquisition [Line Items] |  |  |  |  |
Goodwill | $ 538,418 | $ 482,144 | $ 538,418 | $ 482,144 | $ 476,378
Amortization of Intangible Assets | 2,900 | $ 2,200 | 7,900 | $ 5,800 |
BIOTIX [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  | 105,000 |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High | 65,000 |  | 65,000 |  |
Business Combination, Contingent Consideration, Liability | 30,700 |  | 30,700 |  |
Goodwill | 51,300 |  | 51,300 |  |
Amortization of Intangible Assets |  |  | 3,700 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net | 19,200 |  | 19,200 |  |
Other Acquisitions [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  | 0 |  |
Goodwill | 0 |  | 0 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net | $ 0 |  | $ 0 |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  |  | 12 years |  |
Customer Relationships [Member] | BIOTIX [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Finite-lived Intangible Assets Acquired |  |  | $ 49,500 |  |
Technology-Based Intangible Assets [Member] | BIOTIX [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Finite-lived Intangible Assets Acquired |  |  | 8,000 |  |
Technology-Based Intangible Assets [Member] | Other Acquisitions [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Finite-lived Intangible Assets Acquired |  |  | 0 |  |
Trade Names [Member] | BIOTIX [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Indefinite-lived Intangible Assets Acquired |  |  | 7,100 |  |
Other Intangible Assets [Member] | BIOTIX [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Finite-lived Intangible Assets Acquired |  |  | $ 600 |  |
Minimum [Member] | BIOTIX [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  |  | 5 years |  |
Maximum [Member] | BIOTIX [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  |  | 18 years |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 + Details
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- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=84160947&loc=d3e2207-128464 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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