Note 2 - Other Assets (Details Textual) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Jun. 30, 2015
Computer Software, Intangible Asset [Member]
Amortization of Intangible Assets	$ 800,000		$ 800,000
Finite-Lived Intangible Asset, Useful Life				15 years
Finite-Lived Intangible Assets, Amortization Expense, Year Two	3,300,000			$ 3,300,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	3,300,000			3,300,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	3,300,000			3,300,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	3,300,000			3,300,000
Indefinite-Lived Franchise Rights	7,000,000	$ 7,000,000		7,000,000
Goodwill and Intangible Asset Impairment		0
Amortization of Intangible Assets			$ 1,600,000	1,600,000
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	3,300,000			3,300,000
Capitalized Computer Software, Net	37,600,000	38,500,000		37,600,000
Capitalized Computer Software, Accumulated Amortization	$ 11,900,000	$ 10,300,000		$ 11,900,000