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Business Combination - Consideration Transfered (Details) - USD ($) $ in Thousands	Aug. 23, 2018	Sep. 30, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Estimated fair value of deferred consideration payable		$ 38,200	$ 0
Contingent consideration payable		218,700	$ 0
Agilis
Business Acquisition [Line Items]
Cash consideration	$ 49,221
Fair value of PTC common stock issued	155,860
Estimated fair value of deferred consideration payable	38,200
Contingent consideration payable	218,700	$ 218,700
Total preliminary consideration transferred	$ 461,981

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Business Combination, Consideration, Liability, Deferred Consideration Payable

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled beyond one year or the normal operating cycle, if longer.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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