Income Taxes (Reconciliation of Expected Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Effective Income Tax Rate Reconciliation, Amount
Expected United States federal income tax at statutory rate	$ 31,200	$ 41,443	$ 74,504
State income taxes, net of federal benefit	3,034	5,447	4,795
Domestic manufacturing deduction	(1,691)	(1,233)	(1,210)
Foreign income at different rates	(6,539)	(4,051)	(9,515)
Impairment of goodwill and intangibles	0	23,172	0
Change in valuation allowance	(60)	5,067	963
Corporate tax reorganization	0	(4,173)	(20,670)
Unrealized foreign exchange losses	807	7,056	0
Change in reserves for uncertain tax positions	(4,417)	1,448	(635)
Non-taxable gains on acquisition of pre-existing ownership interests in HPPC and Empire	0	0	(2,793)
Reduction of deferred tax liabilities resulting from change in United Kingdom tax rate	(1,841)	(4,942)	0
Other	1,349	1,698	3,096
Total	$ 21,842	$ 70,932	$ 48,535
Effective Income Tax Rate Reconciliation, Percent
Expected United States federal income tax at statutory rate	35.00%	35.00%	35.00%
State income taxes, net of federal benefit	3.40%	4.60%	2.20%
Domestic manufacturing deduction	(1.90%)	(1.00%)	(0.60%)
Foreign income at different rates	(7.30%)	(3.40%)	(4.50%)
Impairment of goodwill and intangibles	0.00%	19.60%	0.00%
Change in valuation allowance	(0.10%)	4.30%	0.50%
Corporate tax reorganization	(0.00%)	(3.50%)	(9.70%)
Unrealized foreign exchange losses	0.90%	6.00%	0.00%
Change in reserves for uncertain tax positions	(5.00%)	1.20%	(0.30%)
Non-taxable gains on acquisition of pre-existing ownership interests in HPPC and Empire	0.00%	0.00%	(1.30%)
Reduction of deferred tax liabilities resulting from change in United Kingdom tax rate	(2.10%)	(4.20%)	0.00%
Other	1.60%	1.30%	1.50%
Provision for income taxes	24.50%	59.90%	22.80%