ACCOUNTS RECEIVABLE RESERVES (Receivables Reserves) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Receivables [Abstract]
Balance, beginning of year	$ 15,014	$ 14,212	$ 14,116
Provision charged to expense	46,241	24,324	22,990
Charge-offs and adjustments	(35,233)	(22,682)	(21,546)
Currency translation adjustments	(457)	(840)	(1,348)
Balance, end of year	$ 25,565	$ 15,014	$ 14,212