CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 45,620	$ 36,542
Billed accounts receivable, less allowance for doubtful accounts of $5,898 and $3,400, respectively	481,366	382,867
Unbilled accounts receivable	37,180
Other receivables	16,361	21,235
Inventories	12,416	10,303
Prepaid expenses and other	6,544	8,294
Costs and estimated earnings in excess of billings	10,213	30,116
Total current assets	609,700	489,357
PROPERTY AND EQUIPMENT, NET	99,618	87,591
GOODWILL	235,182	200,584
IDENTIFIABLE INTANGIBLE ASSETS, NET	95,275	76,044
DEFERRED TAX ASSETS	17,634	22,966
OTHER NONCURRENT ASSETS	5,155	4,578
Total assets	1,062,564	881,120
CURRENT LIABILITIES:
Current maturities of long-term debt	3,279	613
Accounts payable	176,167	132,011
Accrued compensation and benefits	87,388	69,217
Billings in excess of costs and estimated earnings	130,986	106,005
Accrued self-insurance	36,386	32,228
Other current liabilities	32,852	33,654
Total current liabilities	467,058	373,728
LONG-TERM DEBT	73,639	59,926
DEFERRED TAX LIABILITIES	1,387	2,263
OTHER LONG-TERM LIABILITIES	22,433	27,258
Total liabilities	564,517	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, 4,229,653 and 3,936,291 shares, respectively	(87,747)	(63,519)
Additional paid-in capital	316,479	312,784
Retained earnings	268,904	168,269
Total stockholders’ equity	498,047	417,945
Total liabilities and stockholders’ equity	$ 1,062,564	$ 881,120