Debt Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015
Debt Instrument [Line Items]
Capital leases - short term	$ 213		$ 1,881
Interest Paid	748	$ 415
Capital Expenditures Incurred but Not yet Paid	(1,379)	$ 5,444
Unsecured Debt [Member]
Debt Instrument [Line Items]
Unsecured Loan, Unused Borrowing Capacity	$ 5,000
Unsecured Loan, Maturity Date	Apr. 30, 2017
Unsecured Loan, Amount Outstanding	$ 0
Revolving Credit Facility [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Revolving Credit Facility, Current Borrowing Capacity	300,000
Revolving Credit Facility, Maximum Borrowing Capacity	$ 600,000
Revolving Credit Facility, Expiration Date	Feb. 20, 2020
Long-term Debt	$ 100,000		$ 50,000
Federal Funds Effective Swap Rate [Member] | Revolving Credit Facility [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Basis Spread on Variable Rate	0.50%
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Basis Spread on Variable Rate	1.00%
Prime Rate [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Basis Spread on Variable Rate	1.00%