Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 22,430	$ 14,938	$ 62,627	$ 51,143
Other comprehensive income (loss):
Foreign currency translation adjustments	3,002	4,553	(12,145)	(9,009)
Pension adjustment, net of taxes of ($40) and $45 for the three and nine months ended March 31, 2017, respectively, and ($5) and $9 for the three and nine months ended March 31, 2016, respectively	(149)	(17)	163	32
Comprehensive income	$ 25,283	$ 19,474	$ 50,645	$ 42,166