Note 7 - Fair Value Measurements (Details) - Assets and Liabilities Measured at Fair Value (USD $) In Millions, unless otherwise specified	Mar. 31, 2014
Fair Value, Inputs, Level 1 [Member]
Note 7 - Fair Value Measurements (Details) - Assets and Liabilities Measured at Fair Value [Line Items]
Trading investments	$ 12.8
Fair Value, Inputs, Level 2 [Member]
Note 7 - Fair Value Measurements (Details) - Assets and Liabilities Measured at Fair Value [Line Items]
Interest rate swap	2.8
Senior notes	$ (252.7)