CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 133,264	$ 50,788
Billed accounts receivable, less allowance for credit losses of $10,337 and $6,907, respectively	643,748	619,037
Unbilled accounts receivable, less allowance for credit losses of $785 and $0, respectively	51,058	55,542
Other receivables, less allowance for credit losses of $875 and $0, respectively	17,908	37,632
Inventories	10,312	10,053
Prepaid expenses and other	14,612	14,396
Costs and estimated earnings in excess of billings, less allowance for credit losses of $25 and $0, respectively	7,541	2,736
Total current assets	878,443	790,184
PROPERTY AND EQUIPMENT, NET	113,974	109,796
LEASE RIGHT-OF-USE ASSET	82,301	84,073
GOODWILL	347,391	332,447
IDENTIFIABLE INTANGIBLE ASSETS, NET	167,675	159,974
DEFERRED TAX ASSETS	21,803	21,923
OTHER NONCURRENT ASSETS	6,480	6,615
Total assets	1,618,067	1,505,012
CURRENT LIABILITIES:
Current maturities of long-term debt	850	20,817
Accounts payable	184,627	196,195
Accrued compensation and benefits	81,305	102,891
Billings in excess of costs and estimated earnings	215,106	166,918
Accrued self-insurance	42,027	39,546
Other current liabilities	75,710	81,630
Total current liabilities	599,625	607,997
LONG-TERM DEBT, NET	333,113	205,318
LEASE LIABILITIES	70,410	72,697
DEFERRED TAX LIABILITIES	1,425	1,425
OTHER LONG-TERM LIABILITIES	20,451	32,271
Total liabilities	1,025,024	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, 4,673,627 and 4,465,448 shares, respectively	(112,513)	(103,960)
Additional paid-in capital	323,103	320,168
Retained earnings	382,042	368,685
Total stockholders' equity	593,043	585,304
Total liabilities and stockholders' equity	$ 1,618,067	$ 1,505,012