UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]        
NET EARNINGS $ 17,221 $ 16,775 $ 30,644 $ 27,446
OTHER COMPREHENSIVE INCOME, NET OF TAX:        
Foreign currency translation adjustments 391 122 703 (95)
Other comprehensive income (loss) 391 122 703 (95)
TOTAL COMPREHENSIVE INCOME $ 17,612 $ 16,897 $ 31,347 $ 27,351