CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CONSOLIDATED STATEMENTS OF OPERATIONS
REVENUE	$ 700,131	$ 538,473
COST OF SERVICES	583,038	431,808
Gross profit	117,093	106,665
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	92,924	78,905
GAIN ON SALE OF ASSETS	(554)	(219)
Operating income	24,723	27,979
OTHER INCOME (EXPENSE):
Interest income	64	25
Interest expense	(2,617)	(1,062)
Changes in the fair value of contingent earn-out obligations	2,272	(158)
Other	25	15
Other income (expense)	(256)	(1,180)
INCOME BEFORE INCOME TAXES	24,467	26,799
PROVISION FOR INCOME TAXES	6,751	6,933
NET INCOME	$ 17,716	$ 19,866
INCOME PER SHARE:
Basic (in shares)	$ 0.48	$ 0.54
Diluted (in shares)	$ 0.48	$ 0.53
SHARES USED IN COMPUTING INCOME PER SHARE:
Basic (in shares)	36,674	36,923
Diluted (in shares)	36,905	37,234
DIVIDENDS PER SHARE (in dollars per share)	$ 0.105	$ 0.095