Note 2 - Long-term Debt (Details) - Long-term Debt Summary (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Long-term debt including current portion:
Total outstanding principal	$ 836,953	$ 837,048
Less current portion	(203)	(224)
Net carrying value	842,360	842,650
Borrowing availability under the 2012 Senior Credit Facility	30,000	30,000
2012 Senior Credit Facility [Member]
Long-term debt including current portion:
2012 Senior Credit Facility	159,000	159,000
2020 Notes [Member]
Long-term debt including current portion:
2020 Notes	675,000	675,000
Plus unamortized premium on our 2020 Notes	5,610	5,826
Excalibur Loan [Member]
Long-term debt including current portion:
Outstanding principal	2,950	3,000
Other Long-term Debt [Member]
Long-term debt including current portion:
Outstanding principal	$ 3	$ 48