Note 12 - Stock-Based Compensation and Other Benefit Plans (Details) (USD $)	12 Months Ended												1 Months Ended	0 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Participants' Contributions up to 3% of Compensation [Member]	Dec. 31, 2013 Participants' Contributions from 3% to 6% of Compensation [Member]	Dec. 31, 2013 Restricted Stock [Member] 2004 Non-Employee Directors' Incentive Compensation Plan [Member]	Dec. 31, 2013 Restricted Stock [Member]	Dec. 31, 2013 Employee Stock Option [Member]	Dec. 31, 2013 Stock Appreciation Rights (SARs) [Member]	Dec. 31, 2013 Stock Options and Cash-settled Stock Appreciation Rights [Member]	Dec. 31, 2012 Stock Options and Cash-settled Stock Appreciation Rights [Member]	Dec. 31, 2011 Stock Options and Cash-settled Stock Appreciation Rights [Member]	Mar. 31, 2013 Performance Based Restricted Stock Units and Cash Settled Performance Based Restricted Stock Units [Member] Monte Carlo Valuation Model [Member]	Jun. 03, 2013 Performance Based Restricted Stock Units and Cash Settled Performance Based Restricted Stock Units [Member]	Dec. 31, 2013 Performance Based Restricted Stock Units and Cash Settled Performance Based Restricted Stock Units [Member]	Dec. 31, 2012 Performance Based Restricted Stock Units and Cash Settled Performance Based Restricted Stock Units [Member]	Dec. 31, 2011 Performance Based Restricted Stock Units and Cash Settled Performance Based Restricted Stock Units [Member]	Dec. 31, 2013 Performance Based Restricted Stock Units and Cash Settled Performance Based Restricted Stock Units [Member] Minimum [Member]	Dec. 31, 2013 Performance Based Restricted Stock Units and Cash Settled Performance Based Restricted Stock Units [Member] Maximum [Member]	Dec. 31, 2013 Restricted Stock Units and Restricted Stock Awards [Member] Non-employee Director [Member]	Dec. 31, 2013 Restricted Stock Units and Restricted Stock Awards [Member]	Dec. 31, 2012 Restricted Stock Units and Restricted Stock Awards [Member]	Dec. 31, 2011 Restricted Stock Units and Restricted Stock Awards [Member]	Dec. 31, 2013 Restricted Stock Units and Restricted Stock Awards [Member] Minimum [Member]	Dec. 31, 2013 Restricted Stock Units and Restricted Stock Awards [Member] Maximum [Member]	Dec. 31, 2013 2006 Equity Incentive Plan [Member]	Dec. 31, 2012 2006 Equity Incentive Plan [Member]	Dec. 31, 2011 2006 Equity Incentive Plan [Member]	Dec. 31, 2006 2006 Equity Incentive Plan [Member]
Note 12 - Stock-Based Compensation and Other Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)						67,365	960,129								149,532	0	0		1.50
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)						$ 11.43	$ 11.78						$ 13.11		$ 13.11
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)						180,608																				3,737,772	8,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)																										12,250,000		8,000,000	5,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period								3 years												1 year				3 years	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period								10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures (in Shares)	497,658
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate		0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 6,100,000	$ 1,000,000	$ 2,500,000
Proceeds from Stock Options Exercised	8,300,000	1,100,000	3,600,000
Per Share Value Used for Calculating Cash Settlement of Stock Appreciation Rights (in Dollars per share)									$ 7.89
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value (in Dollars per share)							$ 6.71		$ 4.58
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent									600,000
Allocated Share-based Compensation Expense										3,300,000	2,300,000	2,100,000			400,000	0	0				6,700,000	4,600,000	2,800,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	1,900,000	300,000	800,000																		3,000,000	900,000	1,100,000
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsTargetPercentage																		0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	1.02%	0.68%	1.59%											0.52%
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsAverageClosingPrice (in Dollars per share)														$ 11.33
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	53.70%	60.30%	63.10%											53.58%
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized																					14,000,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition																					3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value																					9,500,000	2,500,000	3,200,000
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay				3.00%	6.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match				100.00%	50.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 3,400,000	$ 3,300,000	$ 2,800,000