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Segment Reporting and Significant Customer Information - Revenue for Individual Countries that Exceed 10% of Total Revenue (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2014 | Mar. 31, 2013
Revenue, Major Customer [Line Items] |  |
Sales Revenue, Services, Net | $ 40,195 | $ 42,177
UNITED STATES |  |
Revenue, Major Customer [Line Items] |  |
Sales Revenue, Services, Net | 24,740 | 27,846
UNITED KINGDOM |  |
Revenue, Major Customer [Line Items] |  |
Sales Revenue, Services, Net | 9,212 | 8,424
Rest of The World [Member] |  |
Revenue, Major Customer [Line Items] |  |
Sales Revenue, Services, Net | $ 6,243 | $ 5,907

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- Details
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- Definition Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts. + 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(d)) -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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