Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 252,569	$ 447,858
Receivables, net of allowance for credit loss of $36,086 and $32,838	2,346,384	1,974,381
Contract assets, net of allowance for credit loss	187,973	132,874
Prepaid expenses and other	65,773	85,005
Total current assets	2,852,699	2,640,118
Property and equipment, net	183,244	208,423
Goodwill	1,473,440	1,291,760
Other intangible assets, net	118,741	90,931
Right-of-use lease assets	339,819	310,860
Deferred tax assets	16,631	13,485
Other assets	90,264	85,483
Total assets	5,074,838	4,641,060
Current liabilities:
Accounts payable	1,196,797	984,604
Outstanding checks	72,108	78,231
Accrued expenses:
Compensation	130,958	112,784
Transportation expense	147,590	101,194
Income taxes	12,074	12,354
Other accrued liabilities	74,781	62,706
Current lease liabilities	66,692	61,280
Current portion of debt	59,979	142,885
Total current liabilities	1,760,979	1,556,038
Long-term debt	1,093,087	1,092,448
Noncurrent lease liabilities	279,212	259,444
Noncurrent income taxes payable	22,981	22,354
Deferred tax liabilities	44,942	39,776
Other long-term liabilities	278	270
Total liabilities	3,201,479	2,970,330
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; 179,700 and 179,380 shares issued, 135,900 and 134,895 outstanding	13,590	13,490
Additional paid-in capital	555,416	546,646
Retained earnings	4,293,598	4,144,834
Accumulated other comprehensive loss	(70,855)	(76,149)
Treasury stock at cost (43,800 and 44,485 shares)	(2,918,390)	(2,958,091)
Total stockholders’ investment	1,873,359	1,670,730
Total liabilities and stockholders’ investment	$ 5,074,838	$ 4,641,060