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Condensed Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Statement of Comprehensive Income [Abstract]    
Net income $ 23,121 $ 16,343
Other comprehensive income (loss):    
Translation adjustment, net of tax expense 3,322 9,489
Comprehensive income $ 26,443 $ 25,832