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Acquisitions - Additional Information (Detail) € in Millions, $ in Millions |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 31, 2016 USD ($) | May 31, 2016 USD ($) | May 31, 2015 USD ($) | Aug. 31, 2016 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2016 USD ($) | Jun. 30, 2016 USD ($) | May 31, 2016 EUR (€)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Cash payment on acquisition |  |  |  |  |  | $ 216.1 |  |
Goodwill |  |  |  |  | $ 315.4 | 315.4 | $ 195.3 |
Increase in goodwill due to working capital adjustment |  |  |  |  |  | 0.8 |  |
Decrease in contingent consideration |  |  |  |  |  | 3.2 |  |
Sividon Diagnostics GmbH [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Total consideration transferred |  |  | $ 51.9 |  |  |  |  |
Cash payment on acquisition |  |  | 39.0 |  |  |  |  |
Contingent consideration |  |  | 10.9 |  |  |  |  |
Business acquisition, net cash acquired |  |  | 2.0 |  |  |  |  |
Goodwill |  |  | 18.9 |  |  |  |  |
Acquired intangible assets |  |  | $ 45.4 |  |  |  |  |
Total cash consideration transferred |  | $ 39.0 |  |  |  |  |  |
Business combination upfront and potential in additional performance based milestones |  |  |  |  |  |  | 15.8 | € 15.0
Decrease in contingent consideration |  |  |  |  |  | 0.4 |  |
Decrease in intangibles |  |  |  |  |  | 0.4 |  |
Increase in goodwill |  |  |  |  |  | $ 0.8 |  |
Assurex [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Total consideration transferred | $ 351.6 |  |  | $ 351.6 |  |  |  |
Cash payment on acquisition | 216.1 |  |  |  |  |  |  |
Additional payments upon completion of performance based milestones | 185.0 |  |  | 185.0 |  |  |  |
Contingent consideration | 130.0 |  |  | 130.0 |  |  |  |
Contingent consideration, valuation method |  |  |  |  |  | The fair value of the performance-based milestones was determined by using the Monte Carlo method. |  |
Business acquisition, net cash acquired | 5.5 |  |  | 5.5 |  |  |  |
Amount of cash consideration deposited in escrow account |  |  |  | 19.1 |  |  |  |
Goodwill | 120.5 |  |  | 120.5 | 120.5 | $ 120.5 | $ 116.3 |
Amount transfers into goodwill |  |  |  |  | 1.7 | 1.7 |  |
Increase in goodwill due to working capital adjustment |  |  |  |  |  | 3.1 |  |
Decrease in deferred tax liability due to a change in blended state tax rate |  |  |  |  |  | (0.6) |  |
Decrease in goodwill due to a change in blended state tax rate |  |  |  |  |  | $ (0.6) |  |
Acquired intangible assets | $ 295.6 |  |  | $ 295.6 |  |  |  |
Estimated net cash flows, discount rate |  |  |  |  |  | 16.00% |  |
Acquisition costs |  |  |  |  | 5.0 | $ 5.0 |  |
Revenue contributed by acquired entity |  |  |  |  | 21.8 | 29.0 |  |
Operating expenses related to acquired entity |  |  |  |  | 27.9 | 41.2 |  |
Assurex [Member] | Developed Technology [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acquired intangible assets |  |  |  |  | 256.5 | $ 256.5 |  |
Intangible assets estimated useful lives |  |  |  |  |  | 17 years |  |
Assurex [Member] | Database [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acquired intangible assets |  |  |  |  | $ 39.1 | $ 39.1 |  |
Intangible assets estimated useful lives |  |  |  |  |  | 5 years |  |

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