Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 02, 2021	Apr. 03, 2020
Revenues:
Revenues before reimbursements	$ 109,579	$ 99,720
Reimbursements	6,902	6,233
Revenues	116,481	105,953
Operating expenses:
Compensation and related expenses	74,538	49,985
Other operating expenses	7,710	8,216
Reimbursable expenses	6,902	6,233
General and administrative expenses	3,273	5,531
Total operating expenses	92,423	69,965
Operating income	24,058	35,988
Other income, net:
Interest income, net	29	875
Miscellaneous income (loss), net	6,039	(12,808)
Total other income (loss), net	6,068	(11,933)
Income before income taxes	30,126	24,055
Income taxes	(722)	(2,227)
Net income	$ 30,848	$ 26,282
Net income per share:
Basic (in dollars per share)	$ 0.59	$ 0.50
Diluted (in dollars per share)	$ 0.58	$ 0.49
Shares used in per share computations:
Basic (in shares)	52,536	52,575
Diluted (in shares)	53,333	53,657
Cash dividends declared per common share (in dollars per share)	$ 0.20	$ 0.19