Segment Information - Reconciliation of Total Segment Profit to Income before Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Reconciliation to Income before Income Taxes
Total segment profit for reportable segments	$ 53,313	$ 54,730
General and administrative	(13,676)	(13,157)
Other (expense) income, net	(616)	646
Income before provision for income taxes	51,632	54,779
Operating segments
Reconciliation to Income before Income Taxes
Total segment profit for reportable segments	66,989	67,887
Segment Reconciling Items
Reconciliation to Income before Income Taxes
General and administrative	(13,676)	(13,157)
Other (expense) income, net	(616)	646
Interest (expense) income, net	$ (1,065)	$ (597)