Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
CURRENT ASSETS
Cash and Cash Equivalents, at Carrying Value	$ 161,448	$ 75,378
Trade receivables, net	48,955	64,293
Prepaid tires	9,378	10,989
Other current assets	12,551	13,782
Income tax receivable	170	6,393
Total current assets	232,502	170,835
PROPERTY AND EQUIPMENT
Land and land improvements	46,095	40,283
Buildings	57,505	48,657
Leasehold improvements	437	2,208
Furniture and fixtures	3,057	3,437
Shop and service equipment	10,968	12,202
Revenue equipment	479,068	555,980
Construction in progress	6,540	3,996
Property and equipment, gross	603,670	666,763
Less accumulated depreciation	200,550	223,901
Property and equipment, net	403,120	442,862
Goodwill	132,410	132,410
OTHER INTANGIBLES, NET	14,494	17,022
Deferred Income Tax Assets, Net	4,535	1,737
OTHER ASSETS	19,152	24,261
Assets	806,213	789,127
CURRENT LIABILITIES
Accounts payable and accrued liabilities	10,552	14,366
Compensation and benefits	22,558	26,752
Insurance accruals	22,130	21,368
Other accruals	9,449	12,835
Total current liabilities	64,689	75,321
LONG-TERM LIABILITIES
Income taxes payable	5,577	8,147
Deferred income taxes, net	71,041	65,488
Insurance accruals less current portion	48,934	65,526
Total long-term liabilities	125,552	139,161
COMMITMENTS AND CONTINGENCIES (Note 14)
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 2018 and 2017; outstanding 81,930 and 83,303 in 2018 and 2017, respectively	907	907
Additional paid-in capital	3,454	3,518
Retained earnings	760,262	694,174
Treasury stock, at cost; 8,759 and 7,386 shares in 2018 and 2017, respectively	(148,651)	(123,954)
Stockholders' Equity Attributable to Parent	615,972	574,645
Liabilities and Stockholders' Equity	$ 806,213	$ 789,127