Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 26,418	$ 33,930
Accounts receivable, trade, less allowance of $7,921 and $8,613, respectively	322,846	337,927
Other receivables	52,221	26,545
Inventories and supplies	9,243	10,060
Prepaid taxes, licenses and permits	16,757	16,619
Other current assets	38,849	31,577
Total current assets	466,334	456,658
Property and equipment, at cost:
Land	63,244	59,103
Buildings and improvements	199,734	188,174
Revenue equipment	1,812,186	1,750,290
Service equipment and other	268,372	250,010
Total property and equipment	2,343,536	2,247,577
Less – accumulated depreciation	817,260	760,015
Property and equipment, net	1,526,276	1,487,562
Other non-current assets	151,254	139,284
Total assets	2,143,864	2,083,504
Current liabilities:
Accounts payable	94,634	97,781
Current portion of long-term debt	75,000	75,000
Insurance and claims accruals	69,810	67,304
Accrued payroll	38,347	40,271
Other current liabilities	31,049	30,004
Total current liabilities	308,840	310,360
Long-term debt, net of current portion	225,000	50,000
Other long-term liabilities	21,129	10,911
Insurance and claims accruals, net of current portion	228,218	214,030
Deferred income taxes	249,669	233,450
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.01 par value, 200,000,000 shares authorized; 80,533,536 shares issued; 69,244,525 and 70,441,973 shares outstanding, respectively	805	805
Paid-in capital	112,649	107,455
Retained earnings	1,294,608	1,413,746
Accumulated other comprehensive loss	(14,728)	(16,073)
Treasury stock, at cost; 11,289,011 and 10,091,563 shares, respectively	(282,326)	(241,180)
Total stockholders’ equity	1,111,008	1,264,753
Total liabilities and stockholders’ equity	$ 2,143,864	$ 2,083,504