FAIR VALUE MEASUREMENTS (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2013 Level 3	Jun. 30, 2014 Fair Value, Measurements, Recurring	Jun. 30, 2014 Fair Value, Measurements, Recurring Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	$ 0	$ 0	$ 33,316,000	$ 33,316,000
Performance-based equity awards	0	0	477,000	477,000
Total liabilities measured at fair value on a recurring basis	$ 0	$ 0	$ 33,793,000	$ 33,793,000