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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Statement of Comprehensive Income [Abstract]        
Net income $ 12,125 $ 7,047 $ 23,121 $ 10,648
Other comprehensive income:        
Foreign currency translation adjustment (130) 0 (54) 0
Comprehensive income $ 11,995 $ 7,047 $ 23,067 $ 10,648