Note 12 - Derivative Financial Instruments (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Derivative Liability, Fair Value, Net	$ 4.7	$ 7.5
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	1.9
One-month LIBOR [Member]
Derivative, Variable Interest Rate	0.21%
Initial [Member] | Five Year, $25 Million Interest Rate Swap at a Fixed Rate of 3.495% Effective May 1, 2008 [Member]
Notional Amount of Interest Rate Derivatives	25
Derivative, Fixed Interest Rate	3.495%
Additional [Member] | Five Year, $25 Million Interest Rate Swap at a Fixed Rate of 3.495% Effective May 1, 2008 [Member]
Notional Amount of Interest Rate Derivatives	25
Derivative, Fixed Interest Rate	3.495%
Five Year, $25 Million Interest Rate Swap at a Fixed Rate of 4.495% Effective January 26, 2008 [Member]
Notional Amount of Interest Rate Derivatives	25
Derivative, Fixed Interest Rate	4.495%
Ten Year, $25 Million Interest Rate Swap at a Fixed Rate of 5.587% Effective June 16, 2006 [Member]
Notional Amount of Interest Rate Derivatives	$ 25
Derivative, Fixed Interest Rate	5.587%