CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 19,248	$ 36,542
Billed accounts receivable, less allowance for doubtful accounts of $5,660 and $3,400, respectively	497,861	382,867
Unbilled accounts receivable	40,251
Other receivables	12,187	21,235
Inventories	12,795	10,303
Prepaid expenses and other	6,329	8,294
Costs and estimated earnings in excess of billings	11,008	30,116
Total current assets	599,679	489,357
PROPERTY AND EQUIPMENT, NET	102,960	87,591
GOODWILL	231,190	200,584
IDENTIFIABLE INTANGIBLE ASSETS, NET	98,712	76,044
DEFERRED TAX ASSETS	20,018	22,966
OTHER NONCURRENT ASSETS	7,381	4,578
Total assets	1,059,940	881,120
CURRENT LIABILITIES:
Current maturities of long-term debt	3,279	613
Accounts payable	150,880	132,011
Accrued compensation and benefits	81,888	69,217
Billings in excess of costs and estimated earnings	131,152	106,005
Accrued self-insurance	33,531	32,228
Other current liabilities	45,116	33,654
Total current liabilities	445,846	373,728
LONG-TERM DEBT	93,672	59,926
DEFERRED TAX LIABILITIES	4,835	2,263
OTHER LONG-TERM LIABILITIES	22,820	27,258
Total liabilities	567,173	463,175
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, 3,902,843 and 3,936,291 shares, respectively	(71,084)	(63,519)
Additional paid-in capital	316,354	312,784
Retained earnings	247,086	168,269
Total stockholders’ equity	492,767	417,945
Total liabilities and stockholders’ equity	$ 1,059,940	$ 881,120