GOODWILL (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Goodwill, Carrying Amount in Foreign Countries
Carrying amount of goodwill in foreign countries	$ 9,200	$ 9,800
Changes in the carrying amount of goodwill
Goodwill balance at the beginning of the period	212,477	211,019
Goodwill acquired	73	1,237
Goodwill adjustments due to currency translation	(703)	221
Goodwill balance at the end of the period	$ 211,847	$ 212,477