CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
CURRENT ASSETS:
Cash and cash equivalents	$ 60,007	$ 57,214
Billed accounts receivable, less allowance for credit losses of $9,972 and $10,640, respectively	1,177,550	1,024,082
Unbilled accounts receivable, less allowance for credit losses of $1,103 and $1,011, respectively	82,401	77,030
Other receivables, less allowance for credit losses of $518 and $510, respectively	59,710	38,369
Inventories	41,619	35,309
Prepaid expenses and other	50,482	48,456
Costs and estimated earnings in excess of billings, less allowance for credit losses of $80 and $80, respectively	28,554	27,211
Total current assets	1,500,323	1,307,671
PROPERTY AND EQUIPMENT, NET	170,089	143,949
LEASE RIGHT-OF-USE ASSET	135,532	130,666
GOODWILL	637,487	611,789
IDENTIFIABLE INTANGIBLE ASSETS, NET	285,057	273,901
DEFERRED TAX ASSETS	170,965	115,665
OTHER NONCURRENT ASSETS	15,664	13,837
Total assets	2,915,117	2,597,478
CURRENT LIABILITIES:
Current maturities of long-term debt	13,334	9,000
Accounts payable	396,181	337,385
Accrued compensation and benefits	141,626	127,765
Billings in excess of costs and estimated earnings and deferred revenue	696,371	548,293
Accrued self-insurance	25,764	27,644
Other current liabilities	208,200	120,715
Total current liabilities	1,481,476	1,170,802
LONG-TERM DEBT	133,945	247,245
LEASE LIABILITIES	115,302	111,744
OTHER LONG-TERM LIABILITIES	72,930	67,764
Total liabilities	1,803,653	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, 5,353,626 and 5,362,224 shares, respectively	(195,290)	(187,212)
Additional paid-in capital	338,413	332,080
Retained earnings	967,930	854,644
Total stockholders' equity	1,111,464	999,923
Total liabilities and stockholders' equity	$ 2,915,117	$ 2,597,478