Note 2 - Long-term Debt (Detail) (USD $)	12 Months Ended				12 Months Ended	21 Months Ended	12 Months Ended				12 Months Ended		12 Months Ended		8 Months Ended	12 Months Ended			0 Months Ended		1 Months Ended	8 Months Ended	11 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Scenario, Plan [Member] 2020 Notes [Member]	Dec. 31, 2012 Minimum [Member] 2012 Term Loan [Member]	Dec. 31, 2012 Minimum [Member] 2007 Credit Facility [Member]	Dec. 31, 2012 Maximum [Member] Revolving Loan [Member]	Dec. 31, 2012 Maximum [Member] 2020 Notes [Member]	Dec. 31, 2011 Senior Credit Facility [Member]	Dec. 31, 2011 Term Loan [Member]	Dec. 31, 2012 Revolving Loan [Member]	Dec. 31, 2011 Revolving Loan [Member]	Dec. 31, 2012 2012 Term Loan [Member]	Dec. 31, 2012 2012 Senior Credit Facility [Member]	Dec. 31, 2010 2015 Notes [Member]	Dec. 31, 2012 2015 Notes [Member]	Oct. 22, 2012 2015 Notes [Member]	Dec. 31, 2011 2015 Notes [Member]	Oct. 09, 2012 2020 Notes [Member]	Dec. 31, 2012 2020 Notes [Member]	Apr. 29, 2010 2007 Credit Facility [Member]	Dec. 31, 2010 2007 Credit Facility [Member]	Mar. 31, 2011 2007 Credit Facility [Member]	Dec. 31, 2012 Revolving Credit Facility [Member]
Secured Debt									$ 472,000,000	$ 463,000,000		$ 9,000,000						$ 365,000,000
Debt Instrument, Interest Rate at Period End									3.80%				4.80%
Deferred Finance Costs, Net									4,000,000				4,600,000					6,100,000		7,100,000
Line of Credit Facility, Maximum Borrowing Capacity													555,000,000											40,000,000
Line of Credit Facility, Amount Outstanding													535,000,000	535,000,000
Debt Instrument, Interest Rate Terms											Base Rate is defined as the greatest of (i) the administrative agent's prime rate, (ii) the overnight federal funds rate plus 0.50% and (iii) one-month LIBOR plus 1.0%.		Borrowings under the 2012 Term Loan bear interest, at our option, at either the Base Rate plus 2.50%-2.75% or LIBOR plus 3.50%-3.75%, subject to a LIBOR floor of 1.0%. The 2012 Term Loan also requires us to make quarterly principal repayments equal to 0.25% of the outstanding principal amount of the 2012 Term Loan beginning December 31, 2012.
Line of Credit Facility, Commitment Fee Percentage					0.375%		0.50%
Debt Issuance Cost														9,900,000	8,600,000				7,300,000			4,500,000
Gains (Losses) on Extinguishment of Debt	(46,683,000)		(349,000)											(8,100,000)		(38,600,000)						(300,000)
Debt Instrument, Interest Rate, Stated Percentage																		10.50%	7.50%	7.50%
Debt Instrument, Interest Rate, Effective Percentage																		11.00%		7.60%
Debt Instrument, Repurchased Face Amount																	222,600,000
Gains (Losses) on Extinguishment of Debt, before Write off of Deferred Debt Issuance Cost																29,900,000
Debt Instrument, Unamortized Discount																3,700,000		(4,735,000)		(2,133,000)
Write off of Deferred Debt Issuance Cost																4,600,000
Gains (Losses) On Extinguishment Of Debt Legal Fees																400,000
Debt Instrument, Face Amount																			300,000,000
Debt Instrument Discount Percentage																			99.266%
Proceeds from Issuance of Debt																			297,800,000
Proceeds from Debt, Net of Issuance Costs																			290,900,000
Unsecured Debt																				300,000,000
Debt Instrument Redemption Price Percentage				35.00%				100.00%
Line of Credit Facility, Incentive Fee Percentage																					2.00%		0.75%
Line of Credit Facility, Annual Facility Fee Percentage						0.00%															3.00%
Repayments of Lines of Credit																					300,000,000
Interest Paid	$ 53,300,000	$ 57,400,000	$ 65,000,000