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ACQUISITIONS - SCHEDULE OF BUSINESS ACQUISTIONS (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Business Acquisition [Line Items]      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets $ 76,980 $ 192,099 $ 153,597
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities 25,058 39,836 19,772
Cash paid for acquisitions 51,922 152,263 133,825
Cash Acquired from Acquisition (1,032) (668) 0
Supplemental cash flow disclosure related to acquisitions:      
Payments to Acquire Businesses, Net of Cash Acquired $ 50,890 $ 151,595 $ 138,630