CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 447,858	$ 378,615
Receivables, net of allowance for doubtful accounts of $32,838 and $41,131	1,974,381	2,162,438
Contract assets	132,874	159,635
Prepaid expenses and other	85,005	52,386
Total current assets	2,640,118	2,753,074
Property and equipment	489,976	498,847
Accumulated depreciation and amortization	(281,553)	(270,546)
Net property and equipment	208,423	228,301
Goodwill	1,291,760	1,258,922
Other intangible assets, net of accumulated amortization of $156,879 and $156,246	90,931	108,822
Right-of-use lease assets	310,860
Deferred tax assets	13,485	9,993
Other assets	85,483	68,300
Total assets	4,641,060	4,427,412
Current liabilities:
Accounts payable	984,604	971,023
Outstanding checks	78,231	92,084
Accrued expenses–
Compensation	112,784	153,626
Transportation expense	101,194	119,820
Income taxes	12,354	28,360
Other accrued liabilities	62,706	63,410
Current lease liabilities	61,280
Current portion of debt	142,885	5,000
Total current liabilities	1,556,038	1,433,323
Long-term debt	1,092,448	1,341,352
Noncurrent lease liabilities	259,444
Noncurrent income taxes payable	22,354	21,463
Deferred tax liabilities	39,776	35,757
Other long-term liabilities	270	430
Total liabilities	2,970,330	2,832,325
Commitments and contingencies
Stockholders’ investment:
Preferred stock, $0.10 par value, 20,000 shares authorized; no shares issued or outstanding	0	0
Common stock, $0.10 par value, 480,000 shares authorized; 179,380 and 179,400 shares issued, 134,895 and 137,284 outstanding	13,490	13,728
Additional paid-in capital	546,646	521,486
Retained earnings	4,144,834	3,845,593
Accumulated other comprehensive loss	(76,149)	(71,935)
Treasury stock at cost (44,485 and 42,116 shares)	(2,958,091)	(2,713,785)
Total stockholders’ investment	1,670,730	1,595,087
Total liabilities and stockholders’ investment	$ 4,641,060	$ 4,427,412