Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 238,925	$ 257,413
Receivables, net of allowance for credit loss of $37,518 and $41,542	4,302,321	3,963,487
Contract assets, net of allowance for credit loss	518,752	453,660
Prepaid expenses and other	108,258	129,593
Total current assets	5,168,256	4,804,153
Property and equipment, net of accumulated depreciation and amortization	155,829	139,831
Goodwill	1,472,855	1,484,754
Other intangible assets, net of accumulated amortization	75,789	89,606
Right-of-use lease assets	338,223	292,559
Deferred tax assets	134,404	124,900
Other assets	112,083	92,309
Total assets	7,457,439	7,028,112
Current liabilities:
Accounts payable	1,872,497	1,813,473
Outstanding checks	54,360	105,828
Accrued expenses:
Compensation	190,428	201,421
Transportation expense	405,284	342,778
Income taxes	38,850	100,265
Other accrued liabilities	177,645	171,266
Current lease liabilities	72,686	66,311
Current portion of debt	674,000	525,000
Total current liabilities	3,485,750	3,326,342
Long-term debt	1,594,055	1,393,649
Noncurrent lease liabilities	281,319	241,369
Noncurrent income taxes payable	26,291	28,390
Deferred tax liabilities	16,521	16,113
Other long-term liabilities	1,088	315
Total liabilities	5,405,024	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, 125,116 and 129,186 outstanding	12,512	12,919
Additional paid-in capital	709,163	673,628
Retained earnings	5,411,346	4,936,861
Accumulated other comprehensive loss	(87,860)	(61,134)
Treasury stock at cost (54,088 and 50,020 shares)	(3,992,746)	(3,540,340)
Total stockholders’ investment	2,052,415	2,021,934
Total liabilities and stockholders’ investment	$ 7,457,439	$ 7,028,112