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v2.4.1.9

Segment Information - Revenue by Geographical Location (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | $ 440,900 us-gaap_Revenues | $ 380,585 us-gaap_Revenues | $ 314,027 us-gaap_Revenues
United States [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 394,234 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US | 334,412 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US | 287,716 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US
Foreign Countries [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | $ 46,666 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = omcl_InternationalMember | $ 46,173 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = omcl_InternationalMember | $ 26,311 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = omcl_InternationalMember

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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- Details
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |