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Fair Value Measurement Fair value nonrecurring basis (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Dec. 31, 2016 | [1]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
contingent consideration gross | $ 225,000 |
Business Combination, Contingent Consideration, Liability, Noncurrent | 19,000 | $ 0
Assets Held-for-sale, Long Lived, Fair Value Disclosure | 2,508 |
Fair Value, Inputs, Level 1 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets Held-for-sale, Long Lived, Fair Value Disclosure | 0 |
Fair Value, Inputs, Level 2 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets Held-for-sale, Long Lived, Fair Value Disclosure | 0 |
Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets Held-for-sale, Long Lived, Fair Value Disclosure | $ 2,508 |
[1] | December 31, 2016 balances were derived from audited consolidated financial statements.

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