Note 4 - Inventories (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Jun. 30, 2013
Inventory Disclosure [Abstract]
LIFO Inventory Amount	$ 13.5		$ 13.5		$ 12.9
Inventory Difference Using FIFO Basis	29.4		29.4		30.8
Decrease in Cost of Sales Using LIFO compared to FIFO	0.9		1.4
Increase in Cost of Sales Using LIFO compared to FIFO		$ 3.1		$ 4.1