Note 6 - Goodwill and Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Goodwill, Period Increase (Decrease) (in Dollars)	$ 45.0	$ 189.0
Alabama [Member]
Goodwill Percent	87.20%
Missouri [Member]
Goodwill Percent	12.80%
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life	2 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life	15 years