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PROPERTY AND EQUIPMENT, NET (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
PROPERTY AND EQUIPMENT, NET [Abstract]      
Depreciation $ 10.9 $ 11.2 $ 11.1
Additional equipment purchased $ 18.7 $ 15.0 $ 14.2