Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 24,638	$ 30,098	$ 79,489	$ 60,835
Other comprehensive income (loss):
Foreign currency translation adjustments	8,680	15,703	(6,425)	30,885
Pension adjustment, net of taxes of $8 and ($1) for the three and nine months ended March 31, 2019, respectively, and ($32) and $- for the three and nine months ended March 31, 2018, respectively	29	(118)	(4)
Comprehensive income	$ 33,347	$ 45,683	$ 73,060	$ 91,720