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BUSINESS ACQUISITIONS - Schedule of Contingent Consideration (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2015 | Jun. 30, 2014
Business Acquisition, Contingent Consideration [Roll Forward] |  |
Loss from increase in fair value of contingent consideration liabilities | $ 239 | $ (998)
Level 3 | Potential Cash Consideration Fair Value |  |
Business Acquisition, Contingent Consideration [Roll Forward] |  |
Balance as of January 1, 2015 | 22,008 |
Fair value at June 30, 2015 | 22,247 |
Level 3 | Selling, General and Administrative Expenses | Potential Cash Consideration Fair Value |  |
Business Acquisition, Contingent Consideration [Roll Forward] |  |
Loss from increase in fair value of contingent consideration liabilities | $ 239 |

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- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
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- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + 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 (c) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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