Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
CURRENT ASSETS
Cash and Cash Equivalents, at Carrying Value	$ 113,852	$ 76,684
Trade receivables, net	55,577	56,753
Prepaid tires	8,241	9,107
Other current assets	15,342	8,947
Income tax receivable	0	323
Total current assets	193,012	151,814
PROPERTY AND EQUIPMENT
Land and land improvements	77,525	60,637
Buildings	86,712	70,603
Leasehold improvements	0	437
Furniture and fixtures	4,807	4,255
Shop and service equipment	14,380	13,726
Revenue equipment	590,153	583,134
Construction in progress	5,783	6,351
Property and equipment, gross	779,360	739,143
Less accumulated depreciation	240,080	212,856
Property and equipment, net	539,280	526,287
Goodwill	168,295	168,295
OTHER INTANGIBLES, NET	24,746	27,136
Deferred Income Tax Assets, Net	8,164	6,006
OTHER ASSETS	17,679	19,393
Assets	951,176	898,931
CURRENT LIABILITIES
Accounts payable and accrued liabilities	12,751	11,060
Compensation and benefits	22,422	24,712
Insurance accruals	15,837	17,584
Other Accrued Liabilities	18,557	10,051
Accrued Income Taxes, Current	1,475	0
Total current liabilities	71,042	63,407
LONG-TERM LIABILITIES
Income taxes payable	5,801	5,956
Deferred Income Taxes and Other Tax Liabilities, Noncurrent	104,004	93,698
Insurance accruals less current portion	45,995	51,211
Total long-term liabilities	155,800	150,865
COMMITMENTS AND CONTINGENCIES (Note 12)
STOCKHOLDERS' EQUITY
Preferred stock, par value $.01; authorized 5,000 shares; none issued	0	0
Capital stock, common, $.01 par value; authorized 395,000 shares; issued 90,689 in 2020 and 2019; outstanding 80,653 and 82,028 in 2020 and 2019, respectively	907	907
Additional paid-in capital	4,330	4,141
Retained earnings	890,970	826,666
Treasury stock, at cost; 10,036 and 8,661 shares in 2020 and 2019, respectively	(171,873)	(147,055)
Stockholders' Equity Attributable to Parent	724,334	684,659
Liabilities and Stockholders' Equity	$ 951,176	$ 898,931