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Fair Value Measurements (Recurring Basis) (Details) (Recurring Basis, USD $) In Thousands, unless otherwise specified | Jun. 30, 2014 | Dec. 31, 2013
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Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Contingent consideration to be paid in cash for the acquisitions | $ 0 | $ 0
Significant Other Observable Inputs (Level 2) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Contingent consideration to be paid in cash for the acquisitions | 0 | 0
Significant Unobservable Inputs (Level 3) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Contingent consideration to be paid in cash for the acquisitions | (7,860) | (8,527)
Total Fair Value |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Contingent consideration to be paid in cash for the acquisitions | $ (7,860) | $ (8,527)

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- Definition Fair value of obligations measured on a recurring basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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