Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 16,962	$ 31,833
Accounts receivable, trade, less allowance of $9,183 and $10,298, respectively	261,372	251,023
Other receivables	15,168	17,241
Inventories and supplies	12,768	16,415
Prepaid taxes, licenses and permits	15,374	15,657
Income taxes receivable	21,497	20,052
Other current assets	29,987	27,281
Total current assets	373,128	379,502
Property and equipment, at cost:
Land	56,261	34,356
Buildings and improvements	148,443	134,595
Revenue equipment	1,676,070	1,530,617
Service equipment and other	229,217	209,032
Total property and equipment	2,109,991	1,908,600
Less – accumulated depreciation	747,353	754,130
Property and equipment, net	1,362,638	1,154,470
Other non-current assets	57,237	51,675
Total assets	1,793,003	1,585,647
Current liabilities:
Accounts payable	66,618	70,643
Current portion of long-term debt	20,000	0
Insurance and claims accruals	83,404	64,106
Accrued payroll	26,189	25,233
Other current liabilities	18,650	23,720
Total current liabilities	214,861	183,702
Long-term debt, net of current portion	160,000	75,000
Other long-term liabilities	16,711	19,832
Insurance and claims accruals, net of current portion	113,875	125,195
Deferred income taxes	292,769	246,264
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.01 per value, 200,000,000 shares authorized; 80,533,536 shares issued;72,166,969 and 71,998,750 shares outstanding, respectively	805	805
Paid-in capital	101,035	102,734
Retained earnings	1,084,796	1,022,966
Accumulated other comprehensive loss	(16,917)	(13,063)
Treasury stock, at cost; 8,366,567 and 8,534,786 shares, respectively	(174,932)	(177,788)
Total stockholders’ equity	994,787	935,654
Total liabilities and stockholders’ equity	$ 1,793,003	$ 1,585,647