CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
CURRENT ASSETS:
Cash and cash equivalents	$ 204,758	$ 549,939
Billed accounts receivable, less allowance for credit losses of $15,632 and $15,286, respectively	1,736,976	1,861,212
Unbilled accounts receivable, less allowance for credit losses of $1,539 and $1,475, respectively	110,496	95,786
Other receivables, less allowance for credit losses of $503 and $553, respectively	203,687	86,186
Inventories	63,045	59,224
Prepaid expenses and other	50,859	46,213
Costs and estimated earnings in excess of billings, less allowance for credit losses of $697 and $271, respectively	227,678	91,681
Total current assets	2,597,499	2,790,241
PROPERTY AND EQUIPMENT, NET	295,098	277,180
LEASE RIGHT-OF-USE ASSET	226,620	229,106
GOODWILL	905,843	875,270
IDENTIFIABLE INTANGIBLE ASSETS, NET	441,502	434,417
DEFERRED TAX ASSETS	83,409	85,441
OTHER NONCURRENT ASSETS	19,247	19,433
Total assets	4,569,218	4,711,088
CURRENT LIABILITIES:
Current maturities of long-term debt	4,066	6,042
Accounts payable	560,663	654,943
Accrued compensation and benefits	191,950	228,622
Billings in excess of costs and estimated earnings and deferred revenue	1,267,373	1,149,257
Accrued self-insurance	35,413	42,315
Other current liabilities	351,779	501,591
Total current liabilities	2,411,244	2,582,770
LONG-TERM DEBT	63,776	62,293
LEASE LIABILITIES	210,364	212,107
DEFERRED TAX LIABILITIES	2,225	2,225
OTHER LONG-TERM LIABILITIES	104,596	147,017
Total liabilities	2,792,205	3,006,412
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, 5,815,389 and 5,562,453 shares, respectively	(367,508)	(273,799)
Additional paid-in capital	361,653	350,734
Retained earnings	1,782,457	1,627,330
Total stockholders' equity	1,777,013	1,704,676
Total liabilities and stockholders' equity	$ 4,569,218	$ 4,711,088

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.