Note 11 - Revolving Line of Credit (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	$ 50,000,000
Equity Interest Pledged As Collateral	65.00%
Debt Instrument Maturity Period	4 years
Minimum Unrestricted Cash as Defined in Credit Agreement (in Dollars)	100,000,000
Total Net Leverage Ratio	3.75
Senior Secured Leverage Ratio	2.50
Fixed Charge Coverage Ratio	2.00
Debt Instrument, Unused Borrowing Capacity, Fee (in Dollars)	30,000	32,000
Minimum [Member] | Alternate Base Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Minimum [Member] | LIBOR Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	1.50%
Minimum [Member]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.25%
Maximum [Member] | Alternate Base Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	1.50%
Maximum [Member] | LIBOR Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	2.50%
Maximum [Member]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.45%
Letter of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	$ 10,000,000