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Note 2 - Goodwill and Other Intangible Assets (Detail) (USD $)
3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Jun. 30, 2012
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Sep. 30, 2012
Franchise Rights [Member]
Dec. 31, 2011
Franchise Rights [Member]
Sep. 30, 2012
Computer Software, Intangible Asset [Member]
Sep. 30, 2012
Computer Software, Intangible Asset [Member]
Other Assets, Noncurrent   $ 48,455,000   $ 48,789,000 $ 4,500,000 $ 2,800,000 $ 41,000,000 $ 41,000,000
Finite-Lived Intangible Assets, Accumulated Amortization             3,300,000 3,300,000
Depreciation, Depletion and Amortization   53,196,000 41,220,000       700,000 2,200,000
Finite-Lived Intangible Asset, Useful Life               15 years
Amortization of Intangible Assets               2,900,000
Goodwill, Purchase Accounting Adjustments $ 1,700,000