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Note 8 - Stock-Based Compensation (Details) (USD $)
0 Months Ended 3 Months Ended
May 17, 2011
Mar. 31, 2014
Mar. 31, 2013
Note 8 - Stock-Based Compensation (Details) [Line Items]      
Allocated Share-based Compensation Expense   $ 2,600,000 $ 2,000,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense   1,000,000 800,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)   0 0
Annually [Member] | Phantom Stock Plan [Member] | Officer [Member]
     
Note 8 - Stock-Based Compensation (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     20.00%
Change of Control [Member] | Phantom Stock Plan [Member] | Officer [Member]
     
Note 8 - Stock-Based Compensation (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     100.00%
Restricted Stock Units (RSUs) [Member]
     
Note 8 - Stock-Based Compensation (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted (in Shares)   264,095 243,645
Full Value Awards [Member] | The 2005 Omnibus Incentive Plan [Member]
     
Note 8 - Stock-Based Compensation (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in Shares) 625,000    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)   173,557  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized   6,100,000  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition   3 years 6 months  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value   4,100,000 2,700,000
Non-Full Value Awards [Member] | The 2005 Omnibus Incentive Plan [Member]
     
Note 8 - Stock-Based Compensation (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)   56,920  
Non-Full Value Awards [Member]
     
Note 8 - Stock-Based Compensation (Details) [Line Items]      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized   0  
Phantom Share Units (PSUs) [Member] | Phantom Stock Plan [Member] | Officer [Member]
     
Note 8 - Stock-Based Compensation (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period   1 year  
Phantom Share Units (PSUs) [Member]
     
Note 8 - Stock-Based Compensation (Details) [Line Items]      
Allocated Share-based Compensation Expense   6,000 1,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted (in Shares)   8,126  
The 2005 Omnibus Incentive Plan [Member]
     
Note 8 - Stock-Based Compensation (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Contractual Term   10 years  
Share-Based Compensation Arrangement by Share Based Payment Award Number of Transfer Shares from the Non Full Value Pool (in Shares)   3  
The 2005 Omnibus Incentive Plan [Member] | Minimum [Member]
     
Note 8 - Stock-Based Compensation (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   3 years  
Phantom Stock Plan [Member] | Officer [Member]
     
Note 8 - Stock-Based Compensation (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     5 years
Phantom Stock Plan [Member]
     
Note 8 - Stock-Based Compensation (Details) [Line Items]      
Allocated Share-based Compensation Expense   $ 42,000 $ 99,000