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Note 5 - Property and Equipment (Details) - Property and Equipment, at Cost (USD $) In Thousands, unless otherwise specified					12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended						12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Revenue Equipment [Member]	Dec. 31, 2012 Revenue Equipment [Member]	Dec. 31, 2013 Revenue Equipment [Member] Minimum [Member]	Dec. 31, 2013 Revenue Equipment [Member] Maximum [Member]	Dec. 31, 2013 Office Equipment [Member]	Dec. 31, 2012 Office Equipment [Member]	Dec. 31, 2013 Office Equipment [Member] Minimum [Member]	Dec. 31, 2013 Office Equipment [Member] Maximum [Member]	Dec. 31, 2013 Land and Land Improvements [Member]	Dec. 31, 2012 Land and Land Improvements [Member]	Dec. 31, 2013 Land and Land Improvements [Member] Minimum [Member]	Dec. 31, 2013 Land and Land Improvements [Member] Maximum [Member]	Dec. 31, 2013 Building and Building Improvements [Member]	Dec. 31, 2012 Building and Building Improvements [Member]	Dec. 31, 2013 Building and Building Improvements [Member] Minimum [Member]	Dec. 31, 2013 Building and Building Improvements [Member] Maximum [Member]	Dec. 31, 2013 Construction in Progress [Member]	Dec. 31, 2012 Construction in Progress [Member]	Dec. 31, 2013 Property, Plant and Equipment, Other Types [Member]	Dec. 31, 2012 Property, Plant and Equipment, Other Types [Member]	Dec. 31, 2013 Property, Plant and Equipment, Other Types [Member] Minimum [Member]	Dec. 31, 2013 Property, Plant and Equipment, Other Types [Member] Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Lives					3 years	10 years			5 years	10 years			0 years	10 years			7 years	40 years					2 years	7 years
Property and equipment, at cost	$ 462,376	$ 419,947	$ 372,968	$ 331,761			$ 9,084	$ 13,089			$ 19,009	$ 16,658			$ 41,876	$ 41,050			$ 1,859	$ 1,310	$ 17,580	$ 16,079

X

- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.13)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration