Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
CURRENT ASSETS
Cash and cash equivalents	$ 120,000	$ 75,378
Trade receivables, net of allowance of $1.5 million and $1.5 million	55,520	64,293
Prepaid tires	9,898	10,989
Other current assets	25,422	13,782
Income tax receivable	5,366	6,393
Total current assets	216,206	170,835
PROPERTY AND EQUIPMENT
Land and land improvements	40,917	40,283
Buildings	50,637	48,657
Leasehold improvements	1,070	2,208
Furniture and fixtures	2,886	3,437
Shop and service equipment	10,043	12,202
Revenue equipment	521,007	555,980
Construction in progress	9,297	3,996
Property, Plant and Equipment, Gross	635,857	666,763
Less accumulated depreciation	210,569	223,901
Property and equipment, net	425,288	442,862
GOODWILL	132,410	132,410
OTHER INTANGIBLES, NET	15,096	17,022
Deferred Income Taxes, Net	4,424	1,737
OTHER ASSETS	20,091	24,261
Assets	813,515	789,127
CURRENT LIABILITIES
Accounts payable and accrued liabilities	26,431	14,366
Compensation and benefits	24,200	26,752
Insurance accruals	19,022	21,368
Other accruals	11,811	12,835
Total current liabilities	81,464	75,321
LONG-TERM LIABILITIES
Income taxes payable	5,220	8,147
Deferred income taxes, net	76,443	65,488
Insurance accruals less current portion	55,349	65,526
Total long-term liabilities	137,012	139,161
COMMITMENTS AND CONTINGENCIES (Note 15)
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 81,927 in 2018 and 83,303 in 2017	907	907
Additional paid-in capital	3,373	3,518
Retained earnings	739,461	694,174
Treasury stock, at cost; 8,762 shares in 2018 and 7,386 in 2017	(148,702)	(123,954)
Stockholders' Equity Attributable to Parent	595,039	574,645
Liabilities and Stockholders' Equity	$ 813,515	$ 789,127