Note 2 - Long-term Debt (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Term Loan 2012 [Member]
Line of Credit Facility, Amount Outstanding	$ 535,000,000	$ 535,000,000
2020 Notes [Member]
Unsecured Debt	300,000,000	300,000,000
Debt Instrument, Interest Rate, Stated Percentage	7.50%	7.50%
Debt Instrument, Interest Rate, Effective Percentage	7.60%	7.60%
Deferred Finance Costs, Net	6,800,000	7,100,000
Senior Credit Facility 2012 [Member]
Line of Credit Facility, Amount Outstanding	535,000,000	535,000,000
Debt Instrument, Interest Rate at Period End	4.80%	4.80%
Deferred Finance Costs, Net	$ 4,400,000	$ 4,600,000