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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Revenue Equipment [Member]    
Property and equipment:    
Property and equipment $ 606,144 $ 535,091
Land and Building [Member]    
Property and equipment:    
Property and equipment 73,159 71,105
Buildings And Land Office Equipment And Other [Member]    
Property and equipment:    
Property and equipment 45,294 39,776
Cash and cash equivalents 434 123
Trade, less allowances of $305 and $475, respectively 70,597 72,263
Other 10,885 17,740
Prepaid expenses and other 18,134 16,860
Total current assets 100,050 106,986
Less accumulated depreciation (196,588) (180,223)
Net property and equipment 528,009 465,749
Other assets 3,469 3,726
631,528 576,461
Current liabilities:    
Accounts payable 12,007 17,065
Insurance and claims accruals 16,235 13,998
Accrued liabilities $ 21,634 12,710
Checks issued in excess of cash balances 745
Total current liabilities $ 49,876 44,518
Long-term debt 37,867 24,373
Deferred income taxes 134,364 119,644
Total liabilities $ 222,107 $ 188,535
Stockholders’ equity:    
Preferred stock, $.01 par value per share; 2,000,000 shares authorized; no shares issued and outstanding
Common stock, $.01 par value per share; 96,000,000 shares authorized; 32,759,806 shares at December 31, 2015, and 33,418,829 shares at December 31, 2014, issued and outstanding $ 328 $ 334
Additional paid-in capital 76,468 87,370
Retained earnings 332,625 300,222
Total stockholders’ equity 409,421 387,926
$ 631,528 $ 576,461