Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Debt Instrument [Line Items]
Capital leases - long term	$ 0	$ 816
Long-term Debt and Capital Lease Obligations, Including Current Maturities	0	50,816
Current maturities of long-term debt	0	714
Long-term Debt and Capital Lease Obligations	0	50,102
Capital leases - short term	200	1,881
Debt, Current	200	2,595
Capital Leases, Balance Sheet, Assets by Major Class, Net	2,329
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation	898
Interest Paid	1,320	$ 1,111	$ 620
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
Unsecured Debt [Member]
Debt Instrument [Line Items]
Unsecured Loan, Issuance Date	Mar. 03, 2014
Unsecured Loan, Unused Borrowing Capacity	$ 5,000
Unsecured Loan, Maturity Date	Apr. 30, 2017
Unsecured Loan, Amount Outstanding	$ 0
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%