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New Accounting Pronouncements (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Net cash provided by (used in) operating activities | $ (61,033) | $ (33,218)
Payment for contingent consideration |  | 5,183
Accounting Standards Update 2016-15 |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Net cash provided by (used in) operating activities |  | $ (2,542)

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- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -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 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
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- Definition Amount of cash outflow, made soon after acquisition date of business combination, to settle contingent consideration liability. + 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 (d) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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