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Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Current assets:    
Cash and cash equivalents $ 38,371 $ 15,356
Accounts receivable, net of allowance of $1,429 in 2018 and $1,456 in 2017 94,793 104,153
Drivers' advances and other receivables, net of allowance of $590 in 2018 and $556 in 2017 11,774 15,062
Inventory and supplies 4,273 4,232
Prepaid expenses 6,701 8,699
Assets held for sale 2,249 1,444
Income taxes receivable 11,897 11,551
Other short-term assets 1,729 1,817
Total current assets 171,787 162,314
Property and equipment, at cost 640,838 650,988
Less: accumulated depreciation and amortization (182,768) (186,916)
Net property and equipment 458,070 464,072
Other assets, net 25,476 23,282
Total assets 655,333 649,668
Current liabilities:    
Accounts payable 12,520 11,857
Accrued expenses 22,768 26,520
Current maturities of long-term debt 25,550 24,596
Current portion of capital lease obligations 2,971 2,962
Current portion of insurance and claims accrual 15,104 15,042
Other short-term liabilities 243
Total current liabilities 78,913 81,220
Long-term debt 164,415 164,465
Long-term portion of capital lease obligations 20,967 21,777
Insurance and claims accrual 22,424 21,836
Deferred income taxes 65,539 63,344
Other long-term liabilities 1,387 1,825
Total liabilities 353,645 354,467
Commitments and contingent liabilities
Stockholders' equity:    
Additional paid-in-capital 138,050 137,242
Accumulated other comprehensive income 964 293
Retained earnings 162,479 157,471
Total stockholders' equity 301,688 295,201
Total liabilities and stockholders' equity 655,333 649,668
Common Class A [Member]    
Stockholders' equity:    
Common stock 171 171
Common Class B [Member]    
Stockholders' equity:    
Common stock $ 24 $ 24