Annual report pursuant to Section 13 and 15(d)

GOODWILL (Details)

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GOODWILL (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
GOODWILL.    
Carrying amount of goodwill in foreign countries $ 9,800,000 $ 9,600,000
Changes in the carrying amount of goodwill    
Goodwill balance at the beginning of the period 211,019,000 210,779,000
Goodwill acquired 1,237,000 429,000
Goodwill adjustments due to currency translation 221,000 (189,000)
Goodwill balance at the end of the period $ 212,477,000 $ 211,019,000