GOODWILL AND INTANGIBLE ASSETS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Changes in goodwill
Balance at the beginning of the period	$ 23,105
Foreign currency translation	(488)
Balance at the end of the period	22,617
Intangible assets
Total amortizing intangible assets	42,035		42,970
Accumulated amortization	(3,416)		(3,120)
Total intangible assets, net	39,536		40,771
Amortization expense	367	350
Permits and licenses
Intangible assets
Nonamortizing intangible assets	750		750
Tradename
Intangible assets
Nonamortizing intangible assets	167		171
Developed software
Intangible assets
Total amortizing intangible assets	344		352
Database
Intangible assets
Total amortizing intangible assets	98		100
Customer relationships
Intangible assets
Total amortizing intangible assets	5,178		5,269
Technology - Formulae and processes
Intangible assets
Total amortizing intangible assets	8,939		9,144
Permits, licenses and lease
Intangible assets
Total amortizing intangible assets	27,456		28,085
Non-compete agreements
Intangible assets
Total amortizing intangible assets	$ 20		$ 20