Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Comprehensive income
Net earnings	$ 32,519	$ 39,591	$ 43,548	$ 68,956
Other comprehensive income, net of income taxes
Pension and other postretirement benefit plans activity	(2)	42	(3)	84
Unrealized gain (loss) on interest rate swaps	2,162	(1,276)	(46)	(499)
Other comprehensive income (loss), net of income taxes	2,160	(1,234)	(49)	(415)
Comprehensive income	$ 34,679	$ 38,357	$ 43,499	$ 68,541