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Note 9 - Senior Notes, Credit Facilities, and Capital Leases (Details) (USD $) | 9 Months Ended |  |  |  | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2014 | Feb. 28, 2014 | Dec. 31, 2013 | Apr. 12, 2013 | Sep. 30, 2014 Senior Notes [Member] | Jan. 31, 2014 Senior Notes [Member] | Apr. 12, 2013 Senior Notes [Member]
Note 9 - Senior Notes, Credit Facilities, and Capital Leases (Details) [Line Items] |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  | $ 500,000,000
Pension Contributions | 6,500,000 |  |  |  | 6,500,000 |  |
Proceeds from Issuance of Senior Long-term Debt | 490,000,000 |  |  |  |  |  |
Percentage Of Notes Tendered For Exchange |  |  |  |  |  | 99.99% |
Underwriting Discount on Senior Notes |  |  |  | 2.00% |  |  |
Debt Instrument, Unamortized Discount |  |  |  |  | 8,300,000 |  | 10,000,000
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | 6.875%
Interest Costs Capitalized |  |  |  |  | 8,600,000 |  |
Interest Expense, Debt |  |  |  |  | 18,600,000 |  |
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed |  |  |  |  | 100.00% |  |
Percentage of Notes Redeemable |  |  |  |  | 35.00% |  |
Debt Instrument, Redemption Price, Percentage |  |  |  |  | 101.00% |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | 100,000,000 |  |  |  |  |
Capital Leases Including Purchase Option | 19,400,000 |  |  |  |  |  |
Capital Lease Obligations, Current | 8,470,000 |  | 8,471,000 |  |  |  |
Capital Lease Obligations, Noncurrent | 10,890,000 |  | 14,332,000 |  |  |  |
Capital Lease Obligations | 19,362,000 |  | 22,800,000 |  |  |  |
Capital Leases, Future Minimum Payments Due | 20,190,000 |  |  |  |  |  |
Capital Leases, Future Minimum Payments, Interest Included in Payments | $ 828,000 |  |  |  |  |  |

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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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