Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
CURRENT ASSETS
Cash and cash equivalents	$ 187,085	$ 157,742
Trade receivables, net of $1.1 million allowance in 2022 and 2021, respectively	61,583	52,812
Prepaid tires	10,043	9,168
Other current assets	9,776	9,406
Income Taxes Receivable, Current	0	4,095
Total current assets	268,487	233,223
PROPERTY AND EQUIPMENT
Land and land improvements	90,787	90,218
Buildings	96,685	95,305
Furniture and fixtures	5,399	5,365
Shop and service equipment	17,104	15,727
Revenue equipment	491,924	500,311
Construction in progress	3,732	3,834
Property, Plant and Equipment, Gross	705,631	710,760
Less accumulated depreciation	233,652	222,845
Property and equipment, net	471,979	487,915
GOODWILL	168,295	168,295
OTHER INTANGIBLES, NET	21,758	22,355
OTHER ASSETS	16,594	16,754
Assets	947,113	928,542
CURRENT LIABILITIES
Accounts payable and accrued liabilities	20,278	20,538
Compensation and benefits	24,171	21,411
Insurance accruals	15,248	15,677
Other Accrued Liabilities	14,394	13,968
Accrued Income Taxes, Current	3,452	0
Total current liabilities	77,543	71,594
LONG-TERM LIABILITIES
Income taxes payable	5,313	5,491
Deferred Tax and Other Liabilities, Noncurrent	88,227	89,971
Insurance accruals less current portion	33,502	34,384
Total long-term liabilities	127,042	129,846
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 2022 and 2021; outstanding 78,932 and 78,923 in 2022 and 2021, respectively	907	907
Additional paid-in capital	4,205	4,141
Retained earnings	939,571	924,375
Treasury stock, at cost; 11,757 and 11,766 in 2022 and 2021, respectively	(202,155)	(202,321)
Stockholders' Equity Attributable to Parent	742,528	727,102
Liabilities and Stockholders' Equity	$ 947,113	$ 928,542