INCOME TAXES (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Changes in the accrual for unrecognized income tax benefits
Balance, beginning of the period	$ 1,838	$ 2,607	$ 5,155
Additions based on tax positions related to the current year	481	281	217
Additions of tax positions of prior years	88	110	958
Reductions of tax positions of current year			(175)
Reductions of tax positions of prior year	(225)	(453)	(2,955)
Lapse of statute of limitations	(664)	(704)	(272)
Foreign currency translation adjustment	(41)	(3)	(321)
Balance, end of the period	1,477	1,838	2,607
Changes in the accrual for unrecognized income tax benefits and related interest and penalties
Balance, beginning of the period	3,442	4,321	6,176
Additions based on tax positions related to the current year	104	61	70
Additions of tax positions of prior years	267	401	949
Reductions of tax positions of current year			(11)
Reductions of tax positions of prior year	(32)	(254)	(1,199)
Lapse of statute of limitations	(1,432)	(1,109)	(719)
Foreign currency translation adjustment	(7)	22	(945)
Balance, end of the period	2,342	3,442	4,321
Accrued unrecognized income tax benefits reversed during the period			2,131
Accrued income tax penalties and interest relating to unrecognized income tax benefits reversed during the period			1,199
Expected increase in total unrecognized tax benefits due to income tax positions	2,482
Portion of expected increase in total unrecognized tax benefits, expected to increase in next twelve months	1,221
Portion of significant change in unrecognized tax benefit within 12 months, decrease due to lapse of statutory limitation	$ 2,426