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Note 16 - Quarterly Results of Operations (Unaudited) (Detail) - Quarterly Results of Operations (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Total revenue $ 177,495 $ 168,427 $ 171,301 $ 157,031 $ 161,953 $ 161,418 $ 172,865 $ 156,391 $ 674,254 $ 652,627 $ 649,749
Operating income (1) 5,149 4,645 11,059 2,357 1,159 (9,754) 7,234 301 23,209 (1,061) 26,008
Net income (loss) (1) $ 1,452 $ 1,002 $ 4,251 $ (640) $ (2,245) $ (11,213) $ 1,655 $ (2,464) $ (6,065) $ 14,267 $ (3,289)
Basic and diluted income (loss) per share (in Dollars per share) $ 0.10 $ 0.07 $ 0.29 $ (0.04) $ (0.15) $ (0.76) $ 0.11 $ (0.17) $ 0.41 $ (0.97) $ 0.23