Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 121,838	$ 145,524
Receivables, net of allowance for credit loss of $16,351 and $14,229	2,592,576	2,381,963
Contract assets, net of allowance for credit loss	235,326	189,900
Prepaid expenses and other	174,441	163,307
Total current assets	3,124,181	2,880,694
Property and equipment, net of accumulated depreciation and amortization	143,497	144,718
Goodwill	1,467,018	1,473,600
Other intangible assets, net of accumulated amortization	40,127	43,662
Right-of-use lease assets	366,604	353,890
Deferred tax assets	219,443	214,619
Other assets	111,218	114,097
Total assets	5,472,088	5,225,280
Current liabilities:
Accounts payable	1,390,019	1,303,951
Outstanding checks	63,650	66,383
Accrued expenses:
Compensation	110,899	135,104
Transportation expense	186,027	147,921
Income taxes	6,246	4,748
Other accrued liabilities	162,627	159,435
Current lease liabilities	74,818	74,451
Current portion of debt	280,000	160,000
Total current liabilities	2,274,286	2,051,993
Long-term debt	1,420,776	1,420,487
Noncurrent lease liabilities	310,285	297,563
Noncurrent income taxes payable	21,798	21,289
Deferred tax liabilities	12,090	13,177
Other long-term liabilities	2,859	2,074
Total liabilities	4,042,094	3,806,583
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; 179,199 and 179,204 shares issued, 117,000 and 116,768 outstanding	11,700	11,677
Additional paid-in capital	746,998	754,093
Retained earnings	5,639,629	5,620,790
Accumulated other comprehensive loss	(100,436)	(80,946)
Treasury stock at cost (62,199 and 62,436 shares)	(4,867,897)	(4,886,917)
Total stockholders’ investment	1,429,994	1,418,697
Total liabilities and stockholders’ investment	$ 5,472,088	$ 5,225,280