GOODWILL AND OTHER INTANGIBLE ASSETS - Carrying Amount of Goodwill (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Goodwill [Roll Forward]
December 31, 2013	$ 624,875
Goodwill impairment	(22,437)
Impact of foreign currency translation	(599)
June 30, 2014	601,839
U.S.
Goodwill [Roll Forward]
December 31, 2013	597,456
Goodwill impairment	0
Impact of foreign currency translation	0
June 30, 2014	597,456
International
Goodwill [Roll Forward]
December 31, 2013	27,419
Goodwill impairment	(22,437)
Impact of foreign currency translation	(599)
June 30, 2014	$ 4,383