Note 7 - Accounting for Stock-Based Compensation (Details) (USD $) | 0 Months Ended | 3 Months Ended | 9 Months Ended | |
In Millions, except Share data, unless otherwise specified | Jun. 07, 2013 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Jun. 06, 2013 |
Note 7 - Accounting for Stock-Based Compensation (Details) [Line Items] | ' | ' | ' | ' | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in Shares) | 1,750,000 | ' | ' | ' | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares) | ' | 3,550,000 | ' | 3,550,000 | ' | 1,800,000 |
Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Shared Deducted Per Each Share Delivered (in Shares) | ' | 1.93 | ' | 1.93 | ' | ' |
Allocated Share-based Compensation Expense | ' | $2.30 | $2.50 | $6.60 | $6.40 | ' |
Options, Restricted Stock and RSUs [Member] | ' | ' | ' | ' | ' | ' |
Note 7 - Accounting for Stock-Based Compensation (Details) [Line Items] | ' | ' | ' | ' | ' | ' |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | ' | 17.4 | ' | 17.4 | ' | ' |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition | ' | ' | ' | '2 years | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares) | ' | ' | ' | 400,000 | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares) | ' | 2,100,000 | ' | 2,100,000 | ' | ' |
Cash Settled RSUs [Member] | ' | ' | ' | ' | ' | ' |
Note 7 - Accounting for Stock-Based Compensation (Details) [Line Items] | ' | ' | ' | ' | ' | ' |
Allocated Share-based Compensation Expense | ' | 0.4 | ' | 0.8 | ' | ' |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | ' | 5.8 | ' | 5.8 | ' | ' |
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, Options, Grants in Period, Gross (in Shares) | ' | ' | ' | 200,000 | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | ' | ' | ' | '4 years | ' | ' |
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) | ' | ' | ' | $27.77 | ' | ' |
Share Price (in Dollars per share) | ' | $35.41 | ' | $35.41 | ' | ' |
Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Expected To Vest, Aggregate Intrinsic Value | ' | $6.60 | ' | $6.60 | ' | ' |