DEFERRED REVENUE AND COSTS (DEFERRED REVENUE ROLLFORWARD TABLE) (DETAILS) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
DEFERRED REVENUE AND COSTS [ABSTRACT]
Balance, beginning of year deferred revenue	$ 29,871	$ 8,550	$ 15,667
Add: Amounts deferred due to new business	55,923	67,058	8,761
Less: Revenue recognized	37,051	45,741	15,962
Net increase/(decrease) in deferred revenue	18,872	21,317	(7,201)
Effect of foreign currency	29	4	84
Balance, end of year deferred revenue	$ 48,772	$ 29,871	$ 8,550