Note 2 - Long-term Debt (Detail) (USD $)				60 Months Ended								60 Months Ended		84 Months Ended			3 Months Ended	0 Months Ended	3 Months Ended				3 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Dec. 31, 2012 Scenario, Plan [Member] 2020 Notes [Member]	Oct. 12, 2017 Minimum [Member] New Senior Credit Facility [Member] Line of Credit [Member]	Oct. 12, 2017 Maximum [Member] New Senior Credit Facility [Member] Line of Credit [Member]	Sep. 24, 2012 Maximum [Member] 2015 Notes [Member]	Dec. 31, 2012 Maximum [Member] 2020 Notes [Member]	Sep. 30, 2012 Senior Credit Facility [Member]	Dec. 31, 2011 Senior Credit Facility [Member]	Dec. 31, 2011 Term Loan [Member]	Dec. 31, 2011 Revolving Loan [Member]	Oct. 12, 2017 New Senior Credit Facility [Member] Line of Credit [Member]	Oct. 12, 2012 New Senior Credit Facility [Member] Line of Credit [Member]	Oct. 12, 2019 New Senior Credit Facility [Member] Loans Payable [Member]	Oct. 12, 2012 New Senior Credit Facility [Member] Loans Payable [Member]	Oct. 12, 2012 New Senior Credit Facility [Member]	Dec. 31, 2012 2007 Credit Facility [Member]	Oct. 12, 2012 2015 Notes [Member]	Dec. 31, 2012 2015 Notes [Member]	Sep. 30, 2012 2015 Notes [Member]	Sep. 24, 2012 2015 Notes [Member]	Dec. 31, 2011 2015 Notes [Member]	Dec. 31, 2012 2020 Notes [Member]	Oct. 09, 2012 2020 Notes [Member]
Secured Debt	$ 824,351,000	$ 836,968,000						$ 459,351,000	$ 471,968,000	$ 463,000,000	$ 9,000,000									$ 365,000,000		$ 365,000,000
Debt Instrument, Interest Rate at Period End								3.70%	3.80%
Deferred Finance Costs, Net								3,500,000	4,000,000							10,200,000				5,500,000		6,100,000
Line of Credit Facility, Maximum Borrowing Capacity													40,000,000		555,000,000	595,000,000
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 New 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 New Term Loan also requires us to make quarterly principal repayments equal to 0.25% of the outstanding principal amount of the New Term Loan beginning December 31, 2012.
Line of Credit Facility, Commitment Fee Percentage				0.375%	0.50%
Line of Credit Facility, Amount Outstanding															420,000,000
Gains (Losses) on Extinguishment of Debt																	(8,200,000)		(38,600,000)
Debt Instrument, Interest Rate, Stated Percentage																				10.50%		10.50%
Debt Instrument, Interest Rate, Effective Percentage																				11.00%		11.00%
Debt Instrument, Repurchased Face Amount						268,500,000															222,600,000
Debt Instrument Redemption Price Percentage			35.00%				100.00%											107.875%
Gains (Losses) on Extinguishment of Debt, before Write off of Deferred Debt Issuance Cost																			30,100,000
Debt Instrument, Unamortized Discount																		3,700,000		3,719,000		4,735,000
Write off of Deferred Debt Issuance Cost																		4,600,000
Gains (Losses) On Extinguishment Of Debt Legal Fees																		200,000
Debt Instrument, Face Amount																								300,000,000
Debt Instrument Discount Percentage																								99.266%
Proceeds from Issuance of Debt																							297,800,000
Debt Issuance Cost																							6,900,000
Proceeds from Debt, Net of Issuance Costs																							$ 290,900,000