Note 8 - Long-Term Debt (Detail) - Long-term Debt (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Variable interest rate term notes	$ 80,463	$ 130,092
Fixed interest rate term notes	319,201	198,195
Total debt	399,664	328,287
Less: current maturities	(80,030)	(63,465)
Total	$ 319,634	$ 264,822