CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
CURRENT ASSETS:
Cash and cash equivalents	$ 100,792	$ 205,150
Billed accounts receivable, less allowance for credit losses of $11,949 and $11,926, respectively	1,570,643	1,318,926
Unbilled accounts receivable, less allowance for credit losses of $929 and $850, respectively	76,975	72,774
Other receivables, less allowance for credit losses of $519 and $522, respectively	136,100	166,319
Inventories	71,061	65,538
Prepaid expenses and other	62,500	54,309
Costs and estimated earnings in excess of billings, less allowance for credit losses of $108 and $79, respectively	30,118	28,084
Total current assets	2,048,189	1,911,100
PROPERTY AND EQUIPMENT, NET	226,197	208,568
LEASE RIGHT-OF-USE ASSET	227,157	205,712
GOODWILL	862,934	666,834
IDENTIFIABLE INTANGIBLE ASSETS, NET	489,884	280,397
DEFERRED TAX ASSETS	31,928	17,723
OTHER NONCURRENT ASSETS	16,540	15,245
Total assets	3,902,829	3,305,579
CURRENT LIABILITIES:
Current maturities of long-term debt	12,885	4,867
Accounts payable	557,859	419,962
Accrued compensation and benefits	153,859	169,136
Billings in excess of costs and estimated earnings and deferred revenue	1,131,928	909,538
Accrued self-insurance	29,712	27,774
Other current liabilities	253,416	189,928
Total current liabilities	2,139,659	1,721,205
LONG-TERM DEBT	77,004	39,345
LEASE LIABILITIES	209,717	188,136
DEFERRED TAX LIABILITIES	1,120	1,120
OTHER LONG-TERM LIABILITIES	102,793	77,944
Total liabilities	2,530,293	2,027,750
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
Preferred stock, $.01 par, 5,000,000 shares authorized, none issued and outstanding
Common stock, $.01 par, 102,969,912 shares authorized, 41,123,365 and 41,123,365 shares issued, respectively	411	411
Treasury stock, at cost, 5,428,501 and 5,438,625 shares, respectively	(211,518)	(209,807)
Additional paid-in capital	348,582	339,562
Retained earnings	1,235,061	1,147,663
Total stockholders' equity	1,372,536	1,277,829
Total liabilities and stockholders' equity	$ 3,902,829	$ 3,305,579