CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
CURRENT ASSETS:
Cash and cash equivalents	$ 115,615	$ 58,776
Billed accounts receivable, less allowance for credit losses of $8,694 and $8,808, respectively	804,832	773,716
Unbilled accounts receivable, less allowance for credit losses of $751 and $715, respectively	70,901	61,881
Other receivables, less allowance for credit losses of $498 and $503, respectively	73,677	57,491
Inventories	24,918	21,853
Prepaid expenses and other	31,373	23,704
Costs and estimated earnings in excess of billings, less allowance for credit losses of $53 and $84, respectively	18,313	29,900
Total current assets	1,139,629	1,027,321
PROPERTY AND EQUIPMENT, NET	127,711	128,554
LEASE RIGHT-OF-USE ASSET	124,936	124,756
GOODWILL	593,947	592,114
IDENTIFIABLE INTANGIBLE ASSETS, NET	291,990	304,781
DEFERRED TAX ASSETS	20,577	22,905
OTHER NONCURRENT ASSETS	9,623	8,683
Total assets	2,308,413	2,209,114
CURRENT LIABILITIES:
Current maturities of long-term debt	407	2,788
Accounts payable	267,246	254,788
Accrued compensation and benefits	121,990	129,971
Billings in excess of costs and estimated earnings	316,478	307,380
Accrued self-insurance	22,410	22,227
Other current liabilities	128,668	119,400
Total current liabilities	857,199	836,554
LONG-TERM DEBT, NET	412,079	385,242
LEASE LIABILITIES	107,033	107,701
DEFERRED TAX LIABILITIES	1,745	1,745
OTHER LONG-TERM LIABILITIES	51,949	72,206
Total liabilities	1,430,005	1,403,448
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, 5,170,410 and 5,032,311 shares, respectively	(164,844)	(150,580)
Additional paid-in capital	331,978	327,061
Retained earnings	710,863	628,774
Total stockholders' equity	878,408	805,666
Total liabilities and stockholders' equity	$ 2,308,413	$ 2,209,114