STOCKHOLDERS' EQUITY (Details 4) (USD $) Share data in Thousands, unless otherwise specified					3 Months Ended		6 Months Ended		3 Months Ended			6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2012 Stock Options	Jun. 30, 2011 Stock Options	Jun. 30, 2012 Stock Options	Jun. 30, 2011 Stock Options	Jun. 30, 2012 Restricted Stock Awards		Jun. 30, 2011 Restricted Stock Awards	Jun. 30, 2012 Restricted Stock Awards		Jun. 30, 2011 Restricted Stock Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share
Excluded from the computation of diluted EPS (in shares)					334	864	365	861	1	[1]	395	2	[1]	257
Accumulated other comprehensive income (loss)	$ (15,923,000)	$ (33,940,000)	$ 4,430,000	$ (12,414,000)
Accumulated Other Comprehensive (Loss)/Income
Net unrealized loss on securities available for sale	(16,800,000)		3,600,000
Foreign exchange translation adjustment	$ 912,000		$ 848,000

[1] On April 1, 2012, the Company revised its calculation of earnings per share to account for participating securities under the two-class method. This revision to the earnings per share calculation does not have an impact to previous periods as the amounts are immaterial.