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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Net income $ 4,260 $ 4,444
Other comprehensive income, net of tax    
Change in foreign currency translation, net of tax 12 0
Change in fair value of marketable securities, net of tax 71 175
Adjustment for net (gains)/losses realized and included in net income, net of tax 9 (87)
Total change in unrealized losses on marketable securities, net of tax 80 88
Other comprehensive income 92 88
Comprehensive income $ 4,352 $ 4,532