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Note 9 - Credit Facilities and Capital Leases (Details) (USD $) | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2013 | Apr. 30, 2013 | Apr. 12, 2013 | Dec. 31, 2012 | Oct. 31, 2009
Note 9 - Credit Facilities and Capital Leases (Details) [Line Items] |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 500,000,000 |  |
Underwriting Discount on Senior Notes |  |  | 2.00% |  |
Debt Instrument, Unamortized Discount | 9,900,000 |  | 10,000,000 |  |
Debt Instrument, Interest Rate, Stated Percentage | 6.875% | 6.875% |  |  |
Interest Costs Capitalized | 1,700,000 |  |  |  |
Interest Expense, Debt | 5,900,000 |  |  |  |
Proceeds from Issuance of Senior Long-term Debt | 490,000,000 |  |  |  |
Percentage of Notes Redeemable | 35.00% |  |  |  |
Increase In Annual Rate While In Default | 0.25% |  |  |  |
Increase In Annual Interest Rate | 1.00% |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 100,000,000 | 150,000,000 |  |  | 60,000,000
Debt Instrument, Covenant Description | 2.50 |  |  |  |
Capital Leases Including Purchase Option | 20,800,000 |  |  |  |
Capital Lease Obligations, Current | 7,128,000 |  |  | 5,564,000 |
Capital Lease Obligations, Noncurrent | 13,671,000 |  |  | 11,935,000 |
Capital Lease Obligations | 20,671,000 |  |  | 17,500,000 |
Capital Leases, Future Minimum Payments Due | 21,631,000 |  |  | 1,000,000 |
Leverage Ratio [Member] |  |  |  |  |
Note 9 - Credit Facilities and Capital Leases (Details) [Line Items] |  |  |  |  |
Debt Instrument, Covenant Description | 4.00 |  |  |  |
Interest Coverage Ratio [Member] |  |  |  |  |
Note 9 - Credit Facilities and Capital Leases (Details) [Line Items] |  |  |  |  |
Debt Instrument, Covenant Description | 3.0 |  |  |  |
Tangible Net Worth [Member] |  |  |  |  |
Note 9 - Credit Facilities and Capital Leases (Details) [Line Items] |  |  |  |  |
Debt Instrument, Covenant Description | 80% |  |  |  |
Positive Quarterly Net Income [Member] |  |  |  |  |
Note 9 - Credit Facilities and Capital Leases (Details) [Line Items] |  |  |  |  |
Debt Instrument, Covenant Description | 50% |  |  |  |
LIBOR [Member] | Minimum [Member] |  |  |  |  |
Note 9 - Credit Facilities and Capital Leases (Details) [Line Items] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 3.00% |  |  |  |
LIBOR [Member] | Maximum [Member] |  |  |  |  |
Note 9 - Credit Facilities and Capital Leases (Details) [Line Items] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 3.75% |  |  |  |
Alternative Base Rate [Member] | Minimum [Member] |  |  |  |  |
Note 9 - Credit Facilities and Capital Leases (Details) [Line Items] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 2.00% |  |  |  |
Alternative Base Rate [Member] | Maximum [Member] |  |  |  |  |
Note 9 - Credit Facilities and Capital Leases (Details) [Line Items] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 2.75% |  |  |  |
Commitment Fees On Credit Agreement [Member] |  |  |  |  |
Note 9 - Credit Facilities and Capital Leases (Details) [Line Items] |  |  |  |  |
Interest Expense, Debt | 300,000 |  |  |  |
Amortization of Loan Origination Fees [Member] |  |  |  |  |
Note 9 - Credit Facilities and Capital Leases (Details) [Line Items] |  |  |  |  |
Interest Expense, Debt | $ 600,000 |  |  |  |
Minimum [Member] |  |  |  |  |
Note 9 - Credit Facilities and Capital Leases (Details) [Line Items] |  |  |  |  |
Standby Fee Percentage | 0.825% |  |  |  |
Maximum [Member] |  |  |  |  |
Note 9 - Credit Facilities and Capital Leases (Details) [Line Items] |  |  |  |  |
Standby Fee Percentage | 1.05% |  |  |  |

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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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