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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Net income $ 4,240 $ 5,490
Other comprehensive income:    
Foreign currency translation adjustments 4,610  
Net unrealized gain (loss) on available-for-sale securities 1,899 (571)
Comprehensive income $ 10,749 $ 4,919