Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
CURRENT ASSETS
Cash and cash equivalents	$ 128,507	$ 33,232
Trade receivables, net	46,844	61,009
Prepaid tires	8,181	9,584
Other current assets	13,841	8,316
Income tax receivable	4,738	7,641
Deferred income taxes, net	0	16,662
Total current assets	202,111	136,444
PROPERTY AND EQUIPMENT
Land and land improvements	39,356	37,899
Buildings	48,371	47,837
Leasehold improvements	1,703	1,703
Furniture and fixtures	2,096	2,096
Shop and service equipment	11,009	10,917
Revenue equipment	556,464	571,281
Construction in progress	54	213
Property and equipment, gross	659,053	671,946
Less accumulated depreciation	251,405	197,948
Property and equipment, net	407,648	473,998
Goodwill	100,212	100,212
OTHER INTANGIBLES, NET	12,090	14,013
Deferred Income Tax Assets, Net	3,785	0
OTHER ASSETS	12,382	11,363
Assets	738,228	736,030
CURRENT LIABILITIES
Accounts payable and accrued liabilities	12,355	7,516
Compensation and benefits	23,320	24,636
Insurance accruals	19,132	21,573
Other accruals	10,727	12,443
Total current liabilities	65,534	66,168
LONG-TERM LIABILITIES
Income taxes payable	11,954	16,228
Deferred income taxes, net	94,657	112,118
Insurance accruals less current portion	60,257	59,435
Other long-term liabilities	0	12,153
Total long-term liabilities	166,868	199,934
COMMITMENTS AND CONTINGENCIES (Note 12)
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 2016 and 2015; outstanding 83,287 and 84,115 in 2016 and 2015, respectively	907	907
Additional paid-in capital	3,433	4,126
Retained earnings	625,668	575,948
Treasury stock, at cost; 7,402 and 6,574 shares in 2016 and 2015, respectively	(124,182)	(111,053)
Stockholders' Equity Attributable to Parent	505,826	469,928
Liabilities and Stockholders' Equity	$ 738,228	$ 736,030