Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 242,809	$ 257,413
Receivables, net of allowance for credit loss of $42,465 and $41,542	4,391,512	3,963,487
Contract assets, net of allowance for credit loss	504,604	453,660
Prepaid expenses and other	140,306	129,593
Total current assets	5,279,231	4,804,153
Property and equipment, net of accumulated depreciation and amortization	139,926	139,831
Goodwill	1,488,616	1,484,754
Other intangible assets, net of accumulated amortization	84,011	89,606
Right-of-use lease assets	297,425	292,559
Deferred tax assets	129,232	124,900
Other assets	102,897	92,309
Total assets	7,521,338	7,028,112
Current liabilities:
Accounts payable	2,001,180	1,813,473
Outstanding checks	65,735	105,828
Accrued expenses:
Compensation	121,768	201,421
Transportation expense	385,603	342,778
Income taxes	143,656	100,265
Other accrued liabilities	182,754	171,266
Current lease liabilities	68,507	66,311
Current portion of debt	572,000	525,000
Total current liabilities	3,541,203	3,326,342
Long-term debt	1,593,756	1,393,649
Noncurrent lease liabilities	244,302	241,369
Noncurrent income taxes payable	28,617	28,390
Deferred tax liabilities	17,244	16,113
Other long-term liabilities	714	315
Total liabilities	5,425,836	5,006,178
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; 179,204 and 179,206 shares issued, 128,011 and 129,186 outstanding	12,801	12,919
Additional paid-in capital	680,857	673,628
Retained earnings	5,134,667	4,936,861
Accumulated other comprehensive loss	(54,264)	(61,134)
Treasury stock at cost (51,193 and 50,020 shares)	(3,678,559)	(3,540,340)
Total stockholders’ investment	2,095,502	2,021,934
Total liabilities and stockholders’ investment	$ 7,521,338	$ 7,028,112