CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 58,776	$ 54,896
Billed accounts receivable, less allowance for credit losses of $8,808 and $9,087, respectively	773,716	619,544
Unbilled accounts receivable, less allowance for credit losses of $715 and $784, respectively	61,881	45,596
Other receivables, less allowance for credit losses of $503 and $759, respectively	57,491	44,212
Inventories	21,853	13,472
Prepaid expenses and other	23,704	15,510
Costs and estimated earnings in excess of billings, less allowance for credit losses of $84 and $79, respectively	29,900	18,622
Total current assets	1,027,321	811,852
PROPERTY AND EQUIPMENT, NET	128,554	117,206
LEASE RIGHT-OF-USE ASSET	124,756	94,727
GOODWILL	592,114	464,392
IDENTIFIABLE INTANGIBLE ASSETS, NET	304,781	231,807
DEFERRED TAX ASSETS	22,905	29,401
OTHER NONCURRENT ASSETS	8,683	7,970
Total assets	2,209,114	1,757,355
CURRENT LIABILITIES:
Current maturities of long-term debt	2,788
Accounts payable	254,788	204,145
Accrued compensation and benefits	129,971	121,864
Billings in excess of costs and estimated earnings	307,380	226,237
Accrued self-insurance	22,227	49,166
Other current liabilities	119,400	91,492
Total current liabilities	836,554	692,904
LONG-TERM DEBT, NET	385,242	235,733
LEASE LIABILITIES	107,701	80,576
DEFERRED TAX LIABILITIES	1,745	1,339
OTHER LONG-TERM LIABILITIES	72,206	50,374
Total liabilities	1,403,448	1,060,926
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, 5,032,311 and 4,935,186 shares, respectively	(150,580)	(129,243)
Additional paid-in capital	327,061	322,451
Retained earnings	628,774	502,810
Total stockholders' equity	805,666	696,429
Total liabilities and stockholders' equity	$ 2,209,114	$ 1,757,355