INCOME TAXES (Provision for Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income before income tax expense:
Domestic									$ (7,229)	$ 7,001	$ 9,291
Foreign									94,182	69,769	56,572
Income before provision for income taxes	$ 24,582	$ 22,378	$ 18,401	$ 21,592	$ 23,312	$ 20,356	$ 17,435	$ 15,667	$ 86,953	$ 76,770	$ 65,863