BUSINESS ACQUISITIONS - Schedule of Contingent Consideration (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Business Acquisition, Contingent Consideration [Roll Forward]
Loss from increase in fair value of contingent consideration liabilities	$ 125	$ 128
Level 3 | Potential Cash Consideration Fair Value
Business Acquisition, Contingent Consideration [Roll Forward]
Balance as of January 1, 2015			22,008
Fair value at March 31, 2015	22,133		22,008
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	$ 125