Note 10 - Leasing Activities (Details) - Future Minimum Lease Payments Under Capital and Non-cancelable Vehicle Leases (USD $)	Dec. 31, 2014	Dec. 31, 2013
Future Minimum Lease Payments Under Capital and Non-cancelable Vehicle Leases [Abstract]
2015	$ 12,903,000
2015	1,257,000
2016	11,176,000
2016	447,000
2017	12,549,000
2017	131,000
2018	9,113,000
2018	73,000
2019	6,818,000
2019	28
Thereafter	10,051,000
Total minimum lease payments	62,610,000
Total minimum lease payments	1,936,000
Less amount representing interest	(5,360,000)
Present value of net minimum capital lease payments	57,250,000
Less current portion	(11,231,000)us-gaap_CapitalLeaseObligationsCurrent	(10,268,000)us-gaap_CapitalLeaseObligationsCurrent
Obligations under capital leases less current portion	$ 46,019,000	$ 35,199,000

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Amount of capital lease obligation due within one year or the normal operating cycle, if longer.

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date.

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Amount of minimum lease payments for capital leases.

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Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount necessary to reduce net minimum lease payments to present value for capital leases.

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Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes.

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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