CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CONSOLIDATED STATEMENTS OF OPERATIONS
REVENUE	$ 464,941	$ 380,588
COST OF SERVICES	375,888	304,634
Gross profit	89,053	75,954
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	70,023	63,247
GOODWILL IMPAIRMENT		1,105
GAIN ON SALE OF ASSETS	(211)	(154)
Operating income	19,241	11,756
OTHER INCOME (EXPENSE):
Interest income	14	11
Interest expense	(713)	(390)
Changes in the fair value of contingent earn-out obligations	153	(26)
Other	38	18
Other income (expense)	(508)	(387)
INCOME BEFORE INCOME TAXES	18,733	11,369
PROVISION FOR INCOME TAXES	2,074	3,892
NET INCOME	$ 16,659	$ 7,477
INCOME PER SHARE:
Basic (in shares)	$ 0.45	$ 0.20
Diluted (in shares)	$ 0.44	$ 0.20
SHARES USED IN COMPUTING INCOME PER SHARE:
Basic (in shares)	37,192	37,225
Diluted (in shares)	37,628	37,724
DIVIDENDS PER SHARE (in dollars per share)	$ 0.075	$ 0.070