Note 5 - Long-term Debt (Details) - USD ($) | Mar. 13, 2015 | Jan. 31, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014 | Dec. 31, 2014 |
Revolving Credit Facility [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Line of Credit Facility, Maximum Borrowing Capacity | | | $ 98,850,000 | | | $ 98,850,000 | | |
Letters of Credit Outstanding, Amount | | | 1,150,000 | | | $ 1,150,000 | | $ 1,152,000 |
Term Loan [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Line of Credit Facility, Maximum Borrowing Capacity | $ 50,000,000 | | | | | | | |
Eurodollar [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | 1.00% | | |
Federal Funds Effective Swap Rate [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | 0.50% | | |
The 2014 Amendment of Bank Credit Facility [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Debt Instrument Covenant Maximum Dividends Payments And Repurchases Of Securities | | | 50,000,000 | | | $ 50,000,000 | | |
Debt Instrument Covenant Annual Capital Expenditures | | | 75,000,000 | | | 75,000,000 | | |
The 2014 Amendment of Bank Credit Facility [Member] | Subject To Maintaining Certain Financial Covenants [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Debt Instrument Covenant Maximum Dividends Payments And Repurchases Of Securities | | | 75,000,000 | | | 75,000,000 | | |
The 2014 Amendment of Bank Credit Facility [Member] | Revolving Credit Facility [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Line of Credit Facility, Maximum Borrowing Capacity | | | 100,000,000 | | | $ 100,000,000 | | |
Debt Instrument, Term | | | | | | 5 years | | |
Letters of Credit Outstanding, Amount | | | 48,850,000 | | | $ 48,850,000 | | |
The 2014 Amendment of Bank Credit Facility [Member] | Standby Letters of Credit [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Line of Credit Facility, Maximum Borrowing Capacity | | | 50,000,000 | | | 50,000,000 | | |
The 2014 Amendment of Bank Credit Facility [Member] | Swing Line Loans [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Line of Credit Facility, Maximum Borrowing Capacity | | | 10,000,000 | | | 10,000,000 | | |
The 2014 Amendment of Bank Credit Facility [Member] | Senior Secured Term Loan [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Debt Instrument, Face Amount | | | 150,000,000 | | | 150,000,000 | | |
The 2014 Amendment of Bank Credit Facility [Member] | Delayed Draw Term Loan [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Line of Credit Facility, Maximum Borrowing Capacity | | | 50,000,000 | | | 50,000,000 | | |
The 2014 Amendment of Bank Credit Facility [Member] | Term Loan [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Debt Instrument, Face Amount | | | 250,000,000 | | | $ 250,000,000 | | |
Debt Instrument Quarterly Principal Repayment Percentage | | | | | | 5.00% | | |
Debt Instrument, Periodic Payment, Principal | | | | | | $ 10,000,000 | | |
Proceeds from Lines of Credit | | | | | | 200,000,000 | | |
Repayments of Debt | | | 51,875,000 | | $ 30,000,000 | $ 51,875,000 | $ 40,000,000 | |
The 2014 Amendment of Bank Credit Facility [Member] | Senior Secured Term Loan [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Debt Instrument, Term | | | | | | 5 years | | |
Term Loan [Member] | Revolving Credit Facility [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Long-term Line of Credit | | | 148,125,000 | | | $ 148,125,000 | | 150,000,000 |
Term Loan [Member] | The 2014 Amendment of Bank Credit Facility [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Line of Credit Facility, Maximum Borrowing Capacity | | | 50,000,000 | | | $ 50,000,000 | | |
The 2023 Senior Notes [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Debt Instrument, Face Amount | | $ 200,000,000 | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | 5.125% | | | | | | |
Proceeds from Notes Payable | | $ 196,816,000 | | | | | | |
Debt Instrument, Covenant, Dividend Payments Per Share (in Dollars per share) | | $ 0.80 | | | | | | |
The 2023 Senior Notes [Member] | Beginning February 1, 2018 [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Debt Instrument, Redemption Price, Percentage | | 103.844% | | | | | | |
The 2023 Senior Notes [Member] | Before February 1, 2018 [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Debt Instrument, Redemption Price, Percentage | | 105.125% | | | | | | |
Debt Instrument Redeemable, Percent | | 35.00% | | | | | | |
The 2023 Senior Notes [Member] | Scenario, Forecast [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Debt Instrument, Redemption Price, Percentage | | 101.00% | | | | | | |
The 2019 Senior Notes [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Debt Instrument, Face Amount | $ 250,000,000 | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | 6.75% | | | | | | | |
Debt Instrument, Redemption Price, Percentage | 103.375% | | | | | | | |
Debt Instrument, Unamortized Premium | | | | $ 3,200,000 | | | | 3,372,000 |
Debt Redemption Premium | | | | 8,372,000 | | | | |
Income Taxes Paid, Net | | | | 3,106,000 | | | | |
Unamortized Net Deferred Loan Costs | | | | 3,134,000 | | | | |
Interest Expense, Debt | | | | $ 1,688,000 | | | | |
Other Notes Payable [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Debt Instrument, Number of Periodic Payments | | | | | | 60 | | |
Debt Instrument, Periodic Payment | | | | | | $ 125,000 | | |
Long-term Debt | | | 735,000 | | | 735,000 | | 1,445,000 |
Debt Instrument, Unamortized Discount | | | $ 15,000 | | | $ 15,000 | | $ 55,000 |
Debt Instrument, Interest Rate, Effective Percentage | | | 7.00% | | | 7.00% | | 7.00% |
Minimum [Member] | Eurodollar [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | 1.25% | | |
Minimum [Member] | Prime Rate [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | 0.25% | | |
Minimum [Member] | The 2014 Amendment of Bank Credit Facility [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | | | | | | 0.25% | | |
Minimum [Member] | The 2014 Amendment of Bank Credit Facility [Member] | Term Loan [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Line of Credit Facility, Increase (Decrease), Net | | | | | | $ 100,000,000 | | |
Maximum [Member] | Eurodollar [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | 2.00% | | |
Maximum [Member] | Prime Rate [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | 1.00% | | |
Maximum [Member] | The 2014 Amendment of Bank Credit Facility [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | | | | | | 0.40% | | |
Maximum [Member] | The 2014 Amendment of Bank Credit Facility [Member] | Term Loan [Member] | | | | | | | | |
Note 5 - Long-term Debt (Details) [Line Items] | | | | | | | | |
Line of Credit Facility, Maximum Borrowing Capacity | | | $ 200,000,000 | | | $ 200,000,000 | | |