Debt Narrative (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 5,324		$ 4,028
Revolving Credit Facility, Current Borrowing Capacity	150,000
Revolving Credit Facility, Maximum Borrowing Capacity	250,000
Revolving Credit Facility, Expiration Date	Jun. 04, 2015
Revolving Credit Facility, Amount Outstanding	0
Interest Paid	285	299
Capital Expenditures Incurred but Not yet Paid	1,605	5,337
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	5,324
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