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Acquisitions (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |  | 0 Months Ended | 3 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 31, 2014 item | Dec. 31, 2013 | Feb. 18, 2014 Digital PlaySpace, Inc. [Member] | Mar. 31, 2014 Digital PlaySpace, Inc. [Member] | Mar. 31, 2014 Subsequent Event [Member] Medical Modeling Inc. [Member] | Mar. 31, 2014 Subsequent Event [Member] Robtec [Member] | Apr. 16, 2014 Subsequent Event [Member] Robtec [Member]
Business Acquisition [Line Items] |  |  |  |  |  |  |
Number of businesses acquired | 1 |  |  |  |  |  |
Date of acquisition |  |  |  | Feb. 18, 2014 | Apr. 02, 2014 |  |
Date of acquisition agreement |  |  |  |  |  | Apr. 16, 2014 |
Fair value of the consideration paid |  |  | $ 4,000 |  |  |  |
Cash paid for business acquisition |  |  | 2,000 |  |  |  |
Value of shares paid for acquisition |  |  | 2,000 |  |  |  |
Business acquisition, ownership percentage |  |  |  |  |  |  | 70.00%
Maximum earnout payment | $ 4,500 | $ 4,500 |  |  |  |  |

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- Definition Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e845-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Acquisition Date -URI http://asc.fasb.org/extlink&oid=6919109 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e848-128460 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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