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Note 10 - Earnings Per Share (Details) - Dilutive Shares Included in Calculation of Diluted Earnings Per Share
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dilutive Shares Included in Calculation of Diluted Earnings Per Share [Abstract]    
Unvested share-based awards 0.1us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements 0.2us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Detachable warrants to purchase common shares 0.7us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants 1.9us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants
Total 0.8us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment 2.1us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment