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Note 1 - Summary of Significant Accounting Policies (Details) (USD $)
 3 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Sep. 30, 2011
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Restatement Adjustment [Member]
Reclassifications, Increase In Revenue [Member]
Dec. 31, 2012
Restatement Adjustment [Member]
Reclassifications, Decrease In Revenue [Member]
Dec. 31, 2013
Primary Excess Layer of Casualty [Member]
Dec. 31, 2013
Single Loss [Member]
Dec. 31, 2012
Single Loss [Member]
Dec. 31, 2013
Each Policy Year [Member]
Dec. 31, 2012
Each Policy Year [Member]
Dec. 31, 2013
Dec. 31, 2012
Aggregate For 3-Year ended Mar 31, 2013 [Member]
Dec. 31, 2013
Transport Enterprise Leasing, LLC [Member]
May 31, 2011
Transport Enterprise Leasing, LLC [Member]
Dec. 31, 2013
Tractors [Member]
Dec. 31, 2013
Refrigerated Trailers [Member]
Dec. 31, 2013
Dry Van Trailers [Member]
Dec. 31, 2013
Revenue Equipment [Member]
Maximum [Member]
Dec. 31, 2013
Revenue Equipment [Member]
Minimum [Member]
Dec. 31, 2012
Insurance and Claims [Member]
Dec. 31, 2011
Insurance and Claims [Member]
Dec. 31, 2013
Non-Asset Operations [Member]
Solutions [Member]
Dec. 31, 2012
Non-Asset Operations [Member]
Solutions [Member]
Dec. 31, 2013
Factoring Receivables [Member]
Dec. 31, 2013
Receivables from Insurers [Member]
Dec. 31, 2012
Receivables from Insurers [Member]
Dec. 31, 2013
Customer Concentration Risk [Member]
Sales [Member]
Dec. 31, 2012
Customer Concentration Risk [Member]
Sales [Member]
Dec. 31, 2011
Customer Concentration Risk [Member]
Sales [Member]
Dec. 31, 2013
Customer Concentration Risk [Member]
Maximum [Member]
Sales [Member]
Dec. 31, 2012
Customer Concentration Risk [Member]
Maximum [Member]
Sales [Member]
Dec. 31, 2011
Customer Concentration Risk [Member]
Maximum [Member]
Sales [Member]
Dec. 31, 2013
Maximum [Member]
Dec. 31, 2013
Minimum [Member]
Dec. 31, 2013
Self-Insurance [Member]
Dec. 31, 2012
Self-Insurance [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]                                                                                            
Number of Reportable Segments                   1                                                                        
Number of Asset-Based Operating Fleets Aggregated in A Segment                   3                                                                        
Equity Method Investment, Ownership Percentage                                             49.00% 49.00%                                            
Revenues $ 176,487,000 $ 170,843,000 $ 172,488,000 $ 164,731,000 $ 177,495,000 $ 168,427,000 $ 171,301,000 $ 157,031,000 [1]   $ 684,549,000 $ 674,254,000 $ 652,627,000                                       $ 1,700,000 $ 800,000                          
Concentration Risk, Percentage                                                                         34.00% 32.00% 39.00%              
Number of Major Customers                                                                         0 0 0              
Concentration Risk, Threshold Percentage                                                                               10.00% 10.00% 10.00%        
Accounts Receivable, Net, Current 81,242,000       76,220,000         81,242,000 76,220,000                                             13,000,000                        
Allowance for Doubtful Accounts Receivable 1,736,000       1,729,000         1,736,000 1,729,000 1,711,000 1,537,000                                         100,000                        
Cash Advance for Factoring Receivables, Percentage                                                                                     90.00% 80.00%    
Restricted Cash and Cash Equivalents                                                                   400,000                        
Property, Plant and Equipment, Useful Life                                                 5 years 7 years 10 years 10 years 3 years                                  
Property, Plant and Equipment, Salvage Value, Percentage                                                 26.00%   28.00%                                      
Capital Leases of Lessee, Term of Contract                                                       84 months 60 months                                  
Goodwill, Impairment Loss                 11,500,000     11,539,000                                                                    
Goodwill                 0                                                                          
Finite-Lived Intangible Asset, Useful Life                                                                                     20 years 4 years    
Drivers Advances And Other Receivables Net Of Allowance 5,356,000       3,851,000         5,356,000 3,851,000                                               1,000,000 500,000                    
Other Assets                                                                                         600,000 3,400,000
Liability for Claims and Claims Adjustment Expense                               1,000,000 9,000,000 9,000,000 18,000,000 18,000,000 30,000,000 27,000,000                                         20,000,000 10,000,000    
Per Claim Excess Policy Coverage                                                                                     30,000,000      
Auto Policy Release Premium Refund                   13,000,000                                                                        
Non-Cash Premium Credit Related To Commutation Of Policies                   4,000,000                                                                        
Workers' Compensation, Self-Insurance Per Claim                   1,300,000                                                                        
Cargo Losses, Purchased Coverage Per Claim                                                                                     2,000,000 300,000    
Self-Insured Cargo                                                                                       2,000,000    
Employee Annual Insurance Deductible, Per Claim                   400,000                                                                        
Interest Costs Capitalized                   100,000 100,000 100,000                                                                    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)                   3,000 48,247 61,097                                                                    
Reimbursement Revenue                   145,616,000 146,819,000 140,601,000   1,600,000                                                                
Cargo and Freight Revenue                   538,933,000 527,435,000 512,026,000     1,600,000                                                              
Prior Period Reclassification Adjustment                                                           $ 600,000 $ 300,000                              
[1] Includes $2.4 million gain on the sale of a terminal property.