CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue, net (includes $13.3 million and $5.3 million with related parties for the three months ended March 31, 2022 and 2021, respectively)	$ 330,947	$ 259,965
Operating expenses:
Total direct costs	232,270	181,538
Selling, general and administrative	29,366	25,738
Depreciation	4,270	3,812
Amortization	838	1,278
Total operating expenses	266,744	212,366
Income from operations	64,203	47,599
Other income, net:
Miscellaneous income, net	1,067	924
Interest income (expense), net	54	(14)
Total other income, net	1,121	910
Income before income taxes	65,324	48,509
Income tax provision	4,013	5,203
Net income	$ 61,311	$ 43,306
Net income per share attributable to common shareholders:
Basic	$ 1.75	$ 1.21
Diluted	$ 1.69	$ 1.14
Weighted average common shares outstanding:
Basic	34,918	35,753
Diluted	36,364	37,749
Direct Costs
Operating expenses:
Total direct costs	$ 125,434	$ 101,387
Reimbursable Out of Pocket Costs
Operating expenses:
Total direct costs	$ 106,836	$ 80,151