Note 3 - Long-term Debt (Details) - Aggregate Minimum Principal Maturities on Long-term Debt (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Note 3 - Long-term Debt (Details) - Aggregate Minimum Principal Maturities on Long-term Debt [Line Items]
Thereafter	$ 1,231,438
Total	1,231,438us-gaap_DebtInstrumentCarryingAmount
2014 Senior Credit Facility [Member]
Note 3 - Long-term Debt (Details) - Aggregate Minimum Principal Maturities on Long-term Debt [Line Items]
Thereafter	556,438
Total	556,438
2020 Notes [Member]
Note 3 - Long-term Debt (Details) - Aggregate Minimum Principal Maturities on Long-term Debt [Line Items]
Thereafter	675,000
Total	$ 675,000

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.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

Reference 2: 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)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant