CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
CURRENT ASSETS:
Cash and cash equivalents	$ 137,623	$ 57,214
Billed accounts receivable, less allowance for credit losses of $10,343 and $10,640, respectively	1,254,798	1,024,082
Unbilled accounts receivable, less allowance for credit losses of $1,093 and $1,011, respectively	78,566	77,030
Other receivables, less allowance for credit losses of $514 and $510, respectively	212,105	38,369
Inventories	53,899	35,309
Prepaid expenses and other	42,687	48,456
Costs and estimated earnings in excess of billings, less allowance for credit losses of $94 and $80, respectively	32,554	27,211
Total current assets	1,812,232	1,307,671
PROPERTY AND EQUIPMENT, NET	186,864	143,949
LEASE RIGHT-OF-USE ASSET	209,138	130,666
GOODWILL	637,487	611,789
IDENTIFIABLE INTANGIBLE ASSETS, NET	274,128	273,901
DEFERRED TAX ASSETS	5,959	115,665
OTHER NONCURRENT ASSETS	14,811	13,837
Total assets	3,140,619	2,597,478
CURRENT LIABILITIES:
Current maturities of long-term debt	13,333	9,000
Accounts payable	441,128	337,385
Accrued compensation and benefits	174,425	127,765
Billings in excess of costs and estimated earnings and deferred revenue	775,302	548,293
Accrued self-insurance	25,913	27,644
Other current liabilities	198,886	120,715
Total current liabilities	1,628,987	1,170,802
LONG-TERM DEBT	33,932	247,245
LEASE LIABILITIES	191,451	111,744
DEFERRED TAX LIABILITIES	6,649
OTHER LONG-TERM LIABILITIES	72,438	67,764
Total liabilities	1,933,457	1,597,555
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, 5,363,300 and 5,362,224 shares, respectively	(197,085)	(187,212)
Additional paid-in capital	338,830	332,080
Retained earnings	1,065,006	854,644
Total stockholders' equity	1,207,162	999,923
Total liabilities and stockholders' equity	$ 3,140,619	$ 2,597,478