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Acquisitions (Details 1) $ in Thousands | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 USD ($) | Dec. 31, 2016 USD ($) | Apr. 06, 2017 USD ($)
IPC Group |  |  |
Business Acquisition [Line Items] |  |  |
Business Acquisition, Effective Date of Acquisition | Apr. 06, 2017 |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  | 100.00%
Business Acquisition, Name of Acquired Entity | IP Cleaning S.p.A. and its subsidiaries ("IPC Group") |  |
Business Combination, Consideration Transferred | $ 353,769 |  |
Cash Acquired from Acquisition | $ 8,804 |  |
Debt Instrument, Face Amount |  |  | $ 420,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  |  | $ 115,946
Crawford Laboratories, Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Business Acquisition, Effective Date of Acquisition | Jul. 28, 2016 |  |
Business Acquisition, Name of Acquired Entity | Crawford Laboratories, Inc. and affiliates thereof ("Sellers") |  |
Business Combination, Consideration Transferred | $ 11,843 |  |
Payments to Acquire Businesses, Gross |  | $ 10,965 |
Payment to Acquire Businesses, Deferred | $ 878 |  |
Business Acquisition, Number of Deferred Payments | 2 |  |
Business Acquisition, Amount of first deferred payment |  | 575 |
Dofesa Barrido Mecanizado |  |  |
Business Acquisition [Line Items] |  |  |
Business Acquisition, Effective Date of Acquisition | Sep. 01, 2016 |  |
Business Acquisition, Name of Acquired Entity | Dofesa Barrido Mecanizado ("Dofesa") |  |
Business Combination, Consideration Transferred | $ 4,650 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | 3,448 |  |
Business Combination, Consideration Transferred, Net | $ 1,202 |  |
Business Acquisition, Transaction Costs |  | $ 191 |

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