Debt Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2014
Debt Instrument [Line Items]
Capital leases - long term	$ 6,524		$ 7,757
Current maturities of long-term debt	5,601		4,028
Capital leases - short term	2,287		$ 1,379
Revolving Credit Facility, Current Borrowing Capacity	150,000
Revolving Credit Facility, Maximum Borrowing Capacity	$ 250,000
Revolving Credit Facility, Expiration Date	Jun. 04, 2015
Interest Paid	$ 415	$ 301
Capital Expenditures Incurred but Not yet Paid	$ 3,897	$ 7,198
Credit Facility Points Above Federal Funds Rate [Member]
Debt Instrument [Line Items]
Basis Spread on Variable Rate	0.50%
Credit Facility Points Above LIBOR [Member]
Debt Instrument [Line Items]
Basis Spread on Variable Rate	1.00%
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 5,601
Unsecured Debt [Member]
Debt Instrument [Line Items]
Basis Spread on Variable Rate	1.00%
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