Note 2 - Long-term Debt (Details) - Long-term Debt Summary (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Long-term debt including current portion:
Total outstanding principal	$ 1,231,438	$ 1,231,438
Net carrying value	1,236,185us-gaap_LongTermDebtNoncurrent	1,236,401us-gaap_LongTermDebtNoncurrent
2014 Senior Credit Facility [Member]
Long-term debt including current portion:
Senior Credit Facility	556,438	556,438
2020 Notes [Member]
Long-term debt including current portion:
2020 Notes	675,000	675,000
Unamortized premium on our 2020 Notes	4,747	4,963
2014 Revolving Credit Facility [Member]
Long-term debt including current portion:
Borrowing availability under Revolving Credit Facility	$ 50,000	$ 50,000

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Total Long term debt including current portion and before unamortized premium or discount.

+ References

No definition available.

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Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

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The amount of debt premium that was originally recognized at the issuance of the instrument that has yet to be amortized.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 30

-Section 45

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

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