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The amount, measured at acquisition-date fair value, of all liabilities assumed that arise from contingencies and were recognized by the entity.

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Number of another entity's patents that the entity has allegedly infringed.

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No definition available.

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- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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-Publisher FASB

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The floor amount as of the balance sheet date that the entity must expend to satisfy the terms of disclosed arrangements (excluding long-term commitments) in which the entity must commit resources to supply goods or services to one or more customers.

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Commitments And Contingencies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Commitments And Contingencies [Line Items]
Rent expense under operating leases	$ 2,763	$ 2,122	$ 7,673	$ 4,940
Supply commitments, printer assembly	55,494		55,494		41,091
Accrued liability recorded for earnouts	$ 8,938		$ 8,938		$ 5,578
Formlabs, Inc. and Kickstarter, Inc. [Member]
Commitments And Contingencies [Line Items]
Patents allegedly infringed			1
Formlabs, Inc. [Member]
Commitments And Contingencies [Line Items]
Patents allegedly infringed			8