Condensed Consolidated Statements of Income - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
REVENUE	$ 675,545,000	$ 633,224,000
Cost of services	575,971,000	542,717,000
General and administrative expenses	55,736,000	48,086,000
OPERATING INCOME	43,838,000	42,421,000
Interest expense	(2,242,000)	(354,000)
Interest income	53,000	40,000
Other income (expense), net	112,000	(121,000)
INCOME FROM OPERATIONS BEFORE INCOME TAXES AND EQUITY METHOD INVESTMENTS	41,761,000	41,986,000
Provision for income taxes	(10,420,000)	(9,657,000)
Equity in losses of unconsolidated subsidiaries	0	(1,000)
NET INCOME	$ 31,341,000	$ 32,328,000
Class A common stock
BASIC EARNINGS PER SHARE:
Basic earnings per share	$ 0.77	$ 0.80
DILUTED EARNINGS PER SHARE:
Diluted earnings per share	0.76	0.79
Class B common stock
BASIC EARNINGS PER SHARE:
Basic earnings per share	0.77	0.80
DILUTED EARNINGS PER SHARE:
Diluted earnings per share	$ 0.76	$ 0.79