Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net earnings	$ 136,791	$ 113,541	$ 123,650
Other comprehensive income (loss), net of income taxes
Pension and other postretirement benefit plans activity	(2,591)	7,583	6,774
Unrealized loss on interest rate swaps	(1,299)	0	0
Other comprehensive income (loss), net of income taxes	(3,890)	7,583	6,774
Comprehensive income	$ 132,901	$ 121,124	$ 130,424