Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 28, 2020	Dec. 28, 2019
Current Assets
Cash and cash equivalents	$ 177,224	$ 319,515
Short-term investments	33,627	32,901
Trade accounts receivable, less allowance of $8,536 and $7,284	562,528	588,549
Other receivables, including advances to independent contractors, less allowance of $8,847 and $7,667	35,153	35,553
Other current assets	7,624	21,370
Total current assets	816,156	997,888
Operating property, less accumulated depreciation and amortization of $286,593 and $280,849	276,663	285,855
Goodwill	37,182	38,508
Other assets	106,432	105,460
Total assets	1,236,433	1,427,711
Current Liabilities
Cash overdraft	36,002	53,878
Accounts payable	272,175	271,996
Current maturities of long-term debt	39,944	42,632
Insurance claims	50,773	44,532
Dividends payable		78,947
Contractor escrow	24,517	24,902
Other current liabilities	41,420	36,017
Total current liabilities	464,831	552,904
Long-term debt, excluding current maturities	61,977	70,212
Insurance claims	33,456	33,575
Deferred income taxes and other noncurrent liabilities	49,074	49,551
Shareholders' Equity
Common stock, $0.01 par value, authorized 160,000,000 shares, issued 68,167,482 and 68,083,419 shares	682	681
Additional paid-in capital	224,973	226,123
Retained earnings	1,995,018	1,962,161
Cost of 29,796,974 and 28,609,926 shares of common stock in treasury	(1,581,885)	(1,465,284)
Accumulated other comprehensive loss	(11,693)	(2,212)
Total shareholders' equity	627,095	721,469
Total liabilities and shareholders' equity	$ 1,236,433	$ 1,427,711