CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
CURRENT ASSETS:
Cash and cash equivalents	$ 36,542	$ 32,074
Accounts receivable, less allowance for doubtful accounts of $3,400 and $4,288, respectively	382,867	318,837
Other receivables	21,235	20,363
Inventories	10,303	9,208
Prepaid expenses and other	8,294	6,106
Costs and estimated earnings in excess of billings	30,116	29,369
Total current assets	489,357	415,957
PROPERTY AND EQUIPMENT, NET	87,591	68,195
GOODWILL	200,584	149,208
IDENTIFIABLE INTANGIBLE ASSETS, NET	76,044	42,435
DEFERRED TAX ASSETS	22,966	27,170
OTHER NONCURRENT ASSETS	4,578	5,938
Total assets	881,120	708,903
CURRENT LIABILITIES:
Current maturities of long-term debt	613	600
Current maturities of long-term capital lease obligations		163
Accounts payable	132,011	103,440
Accrued compensation and benefits	69,217	61,712
Billings in excess of costs and estimated earnings	106,005	83,985
Accrued self-insurance	32,228	33,520
Other current liabilities	33,654	34,261
Total current liabilities	373,728	317,681
LONG-TERM DEBT	59,926	1,955
LONG-TERM CAPITAL LEASE OBLIGATIONS		93
DEFERRED TAX LIABILITIES	2,263	2,289
OTHER LONG-TERM LIABILITIES	27,258	10,252
Total liabilities	463,175	332,270
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, 3,936,291 and 3,914,251 shares, respectively	(63,519)	(57,387)
Additional paid-in capital	312,784	309,625
Retained earnings	168,269	123,984
Total stockholders’ equity	417,945	376,633
Total liabilities and stockholders' equity	$ 881,120	$ 708,903