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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
	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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X

- 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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