GOODWILL AND INTANGIBLE ASSETS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012
Summary of goodwill amount
Gross carrying value of goodwill	$ 39,132	$ 37,588	[1]	$ 32,434
Accumulated impairment losses	(32,434)	(27,586)		(23,777)
Balance at the beginning of the period	10,002	8,657
Acquisitions	1,626	5,816
Impairment Loss	(4,848)	(3,809)
Goodwill, Written off Related to Sale of Business Unit		(662)
Currency translation adjustments	(82)
Goodwill, Period Increase (Decrease)	(3,304)	1,345
Balance at the end of the period	6,698	10,002
MMS
Summary of goodwill amount
Gross carrying value of goodwill	32,434	32,434	[1]	32,434
Accumulated impairment losses	(32,434)	(27,586)		(23,777)
Balance at the beginning of the period	4,848	8,657
Acquisitions	0	0
Impairment Loss	(4,848)	(3,809)
Goodwill, Written off Related to Sale of Business Unit		0
Currency translation adjustments	0
Goodwill, Period Increase (Decrease)	(4,848)	(3,809)
Balance at the end of the period	0	4,848
ATA
Summary of goodwill amount
Gross carrying value of goodwill	6,698	5,154	[1]	0
Accumulated impairment losses	0	0		0
Balance at the beginning of the period	5,154	0
Acquisitions	1,626	5,816
Impairment Loss	0	0
Goodwill, Written off Related to Sale of Business Unit		(662)
Currency translation adjustments	(82)
Goodwill, Period Increase (Decrease)	1,544	5,154
Balance at the end of the period	$ 6,698	$ 5,154

[1] In accordance with business combination guidance, changes to the purchase price allocation are adjusted retrospectively to the consolidated financial results. The values above include measurement period adjustments recorded in the year ended December 31, 2014 to primarily revise the fair value of other current assets, accrued expenses, and AOCI. The December 31, 2013 balances included in the Consolidated Balance Sheets have been revised to include the effect of the measurement period adjustments.