Note 8 - Stock-Based Compensation (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended								3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Restricted Stock Units (RSUs) [Member] 2014 Omnibus Incentive Plan [Member]	Sep. 30, 2013 Restricted Stock Units (RSUs) [Member] 2014 Omnibus Incentive Plan [Member]	Sep. 30, 2014 Restricted Stock Units (RSUs) [Member] 2014 Omnibus Incentive Plan [Member]	Sep. 30, 2013 Restricted Stock Units (RSUs) [Member] 2014 Omnibus Incentive Plan [Member]	Sep. 30, 2014 Restricted Stock Units (RSUs) [Member]	Sep. 30, 2013 Restricted Stock Units (RSUs) [Member]	Sep. 30, 2014 Restricted Stock Units (RSUs) [Member]	Sep. 30, 2013 Restricted Stock Units (RSUs) [Member]	Sep. 30, 2014 Phantom Share Units (PSUs) [Member] Prior to January 1, 2009 [Member] Officer [Member] Phantom Stock Plan [Member]	Sep. 30, 2014 Phantom Share Units (PSUs) [Member] Officer [Member] Phantom Stock Plan [Member]	Sep. 30, 2014 Phantom Share Units (PSUs) [Member] Phantom Stock Plan [Member]	Sep. 30, 2013 Phantom Share Units (PSUs) [Member] Phantom Stock Plan [Member]	Sep. 30, 2014 Phantom Share Units (PSUs) [Member]	Sep. 30, 2014 Annually [Member] Officer [Member] Phantom Stock Plan [Member]	Sep. 30, 2014 Change of Control [Member] Officer [Member] Phantom Stock Plan [Member]	Sep. 30, 2014 Maximum [Member] 2014 Omnibus Incentive Plan [Member]	Sep. 30, 2014 Minimum [Member] 2014 Omnibus Incentive Plan [Member]	Sep. 30, 2014 Officer [Member] Phantom Stock Plan [Member]	Sep. 30, 2014 2014 Omnibus Incentive Plan [Member]	May 20, 2014 2014 Omnibus Incentive Plan [Member]	Sep. 30, 2014 Phantom Stock Plan [Member]	Sep. 30, 2013 Phantom Stock Plan [Member]	Sep. 30, 2014 Phantom Stock Plan [Member]	Sep. 30, 2013 Phantom Stock Plan [Member]
Note 8 - Stock-Based Compensation (Details) [Line Items]
Allocated Share-based Compensation Expense	$ 500,000	$ 400,000	$ 3,600,000	$ 2,900,000																					$ 100,000	$ (100,000)	$ (100,000)	$ 200,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	200,000	200,000	1,400,000	1,100,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted (in Shares)									2,800	2,400	266,895						9,142
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)	0	0	0	0								246,045
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)																								1,100,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)																							1,097,200
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period																				10 years	3 years	5 years
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized					4,800,000		4,800,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition							3 years 73 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value					4,000	4,000	4,100,000	2,800,000																			34,000	8,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period													1 year	1 year
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage																		20.00%	100.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Share-based Liabilities Paid															$ 21,000	$ 0