CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 53,253	$ 50,788
Billed accounts receivable, less allowance for credit losses of $9,998 and $6,907, respectively	624,526	619,037
Unbilled accounts receivable, less allowance for credit losses of $684 and $0, respectively	47,654	55,542
Other receivables, less allowance for credit losses of $884 and $0, respectively	20,892	37,632
Inventories	12,212	10,053
Prepaid expenses and other	10,453	14,396
Costs and estimated earnings in excess of billings, less allowance for credit losses of $79 and $0, respectively	23,515	2,736
Total current assets	792,505	790,184
PROPERTY AND EQUIPMENT, NET	121,569	109,796
LEASE RIGHT-OF-USE ASSET	97,586	84,073
GOODWILL	420,782	332,447
IDENTIFIABLE INTANGIBLE ASSETS, NET	210,164	159,974
DEFERRED TAX ASSETS	25,833	21,923
OTHER NONCURRENT ASSETS	7,004	6,615
Total assets	1,675,443	1,505,012
CURRENT LIABILITIES:
Current maturities of long-term debt	85	20,817
Accounts payable	202,075	196,195
Accrued compensation and benefits	101,243	102,891
Billings in excess of costs and estimated earnings	226,047	166,918
Accrued self-insurance	46,099	39,546
Other current liabilities	105,937	81,630
Total current liabilities	681,486	607,997
LONG-TERM DEBT, NET	231,442	205,318
LEASE LIABILITIES	83,753	72,697
DEFERRED TAX LIABILITIES	3,365	1,425
OTHER LONG-TERM LIABILITIES	46,964	32,271
Total liabilities	1,047,010	919,708
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, 4,620,071 and 4,465,448 shares, respectively	(112,104)	(103,960)
Additional paid-in capital	322,419	320,168
Retained earnings	417,707	368,685
Total stockholders' equity	628,433	585,304
Total liabilities and stockholders' equity	$ 1,675,443	$ 1,505,012