Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
CURRENT ASSETS
Cash and cash equivalents	$ 82,457	$ 76,684
Trade receivables, net of $1.1 million allowance in 2020 and 2019, respectively	64,133	56,753
Prepaid tires	7,893	9,107
Other current assets	15,162	8,947
Income tax receivable	0	323
Total current assets	169,645	151,814
PROPERTY AND EQUIPMENT
Land and land improvements	75,569	60,637
Buildings	83,324	70,603
Leasehold improvements	0	437
Furniture and fixtures	4,546	4,255
Shop and service equipment	14,127	13,726
Revenue equipment	617,670	583,134
Construction in progress	2,454	6,351
Property, Plant and Equipment, Gross	797,690	739,143
Less accumulated depreciation	254,198	212,856
Property and equipment, net	543,492	526,287
GOODWILL	168,295	168,295
OTHER INTANGIBLES, NET	25,940	27,136
OTHER ASSETS	17,829	19,393
Deferred Income Taxes, Net	5,298	6,006
Assets	930,499	898,931
CURRENT LIABILITIES
Accounts payable and accrued liabilities	15,914	11,060
Compensation and benefits	24,256	24,712
Insurance accruals	16,566	17,584
Other Accrued Liabilities	14,263	10,051
Accrued Income Taxes, Current	531	0
Total current liabilities	71,530	63,407
LONG-TERM LIABILITIES
Income taxes payable	5,669	5,956
Deferred Tax and Other Liabilities, Noncurrent	102,294	93,698
Insurance accruals less current portion	48,391	51,211
Total long-term liabilities	156,354	150,865
COMMITMENTS AND CONTINGENCIES (Note 13)
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 81,356 and 82,028 in 2020 and 2019, respectively	907	907
Additional paid-in capital	4,606	4,141
Retained earnings	855,830	826,666
Treasury stock, at cost; 9,333 and 8,661 in 2020 and 2019, respectively	(158,728)	(147,055)
Stockholders' Equity Attributable to Parent	702,615	684,659
Liabilities and Stockholders' Equity	$ 930,499	$ 898,931