Note 9 - Derivative Financial Instruments (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Derivative Liability, Fair Value, Net	$ 3.9	$ 4.7
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	1.3
One-month LIBOR [Member]
Derivative, Variable Interest Rate	0.20%
50 Million Dollars Interest Rate Swap at a Fixed Rate of 3.495% Matures April 30, 2013 [Member]
Notional Amount of Interest Rate Derivatives	50
Derivative, Fixed Interest Rate	3.495%
$25 Million Interest Rate Swap at a Fixed Rate of 5.587% Matures June 15, 2016 [Member]
Notional Amount of Interest Rate Derivatives	$ 25
Derivative, Fixed Interest Rate	5.587%