Note 4 - Stock-Based Compensation (Details) (USD $)	12 Months Ended										12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013 Based On Budgeted Performance [Member] Performance Shares [Member]	Dec. 31, 2013 Performance Shares [Member]	Dec. 31, 2013 Service-based Vesting [Member]	Dec. 31, 2013 Market-based Vesting [Member] Common Class A [Member] Minimum [Member]	Dec. 31, 2013 Market-based Vesting [Member]	Dec. 31, 2013 Performance Shares [Member]	Dec. 31, 2013 Salaries, Wages, and Related Expenses [Member]	Dec. 31, 2012 Salaries, Wages, and Related Expenses [Member]	Dec. 31, 2011 Salaries, Wages, and Related Expenses [Member]	Dec. 31, 2013 General Supplies And Expenses [Member]	Dec. 31, 2012 General Supplies And Expenses [Member]	Dec. 31, 2011 General Supplies And Expenses [Member]	Dec. 31, 2013 Common Class A [Member]	Dec. 31, 2012 Common Class A [Member]	Dec. 31, 2011 Common Class A [Member]	May 29, 2013 Third Amendment [Member]	May 29, 2013 Second Amendment [Member]
Note 4 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)	1,550,000																			750,000	800,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)	748,809
Maximum Number Of Shares Of Class A Common Stock Awarded To Any Participant In The Incentive Plan In Any Calendar Year (in Shares)	200,000
Allocated Share-based Compensation Expense											$ 300,000	$ 1,200,000	$ 1,000,000	$ 100,000	$ 100,000	$ 100,000
Reversal of Previous Stock Compensation Expense	409,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)	0	0	0
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation	100,000
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	(111,000)	100,000	432,000
Shares Paid for Tax Withholding for Share Based Compensation (in Shares)																	53,188	1,940	61,752
Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased (in Dollars per share)	$ 6.41		$ 9.02															$ 4.60
Payments Related to Tax Withholding for Share-based Compensation	340,000	9,000	561,000														300,000	100,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in Shares)	777,000	764,000	468,000	771,000	368,758	47,440	332,828		28,321	416,198
Share Price (in Dollars per share)								$ 11
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	1,200,000	100,000	2,200,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 1,100,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	24 months