Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
CURRENT ASSETS
Cash and cash equivalents	$ 28,123	$ 49,462
Trade receivables, net	102,740	139,819
Prepaid tires	10,650	11,293
Other current assets	17,602	26,069
Income tax receivable	10,157	3,139
Total current assets	169,272	229,782
PROPERTY AND EQUIPMENT
Land and land improvements	118,682	94,155
Buildings	149,780	143,899
Furniture and fixtures	6,835	6,946
Shop and service equipment	20,822	21,652
Revenue equipment	1,021,208	1,000,472
Construction in progress	2,582	15,070
Property and equipment, gross	1,319,909	1,282,194
Less accumulated depreciation	434,558	308,936
Property and equipment, net	885,351	973,258
GOODWILL	322,597	320,675
OTHER INTANGIBLES, NET	98,537	103,701
DEFERRED INCOME TAX ASSETS, NET	1,494	1,224
OTHER ASSETS	14,953	19,894
OPERATING LEASE RIGHT OF USE ASSETS	17,442	20,954
Assets	1,509,646	1,669,488
CURRENT LIABILITIES
Accounts payable and accrued liabilities	37,777	62,712
Compensation and benefits	28,492	30,972
Insurance accruals	21,507	18,490
Long-term debt and finance lease liabilities - current portion	9,303	13,946
Operating lease liabilities - current portion	9,259	12,001
Other accruals	17,138	18,636
Total current liabilities	123,476	156,757
LONG-TERM LIABILITIES
Income taxes payable	6,270	6,466
Long-term debt and finance lease liabilities less current portion	290,696	399,062
Operating lease liabilities less current portion	8,183	8,953
Deferred income taxes, net	189,121	207,516
Accident and work comp accruals less current portion	26,640	35,257
Total long-term liabilities	520,910	657,254
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 2023 and 2022; outstanding 79,039 and 78,984 in 2023 and 2022, respectively	907	907
Additional paid-in capital	4,527	4,165
Retained earnings	1,060,094	1,051,641
Treasury stock, at cost; 11,650 and 11,705 shares in 2023 and 2022, respectively	(200,268)	(201,236)
Stockholders' Equity Attributable to Parent	865,260	855,477
Liabilities and Stockholders' Equity	$ 1,509,646	$ 1,669,488