Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2022	Jul. 02, 2021	Jul. 01, 2022	Jul. 02, 2021
Revenues:
Revenues before reimbursements	$ 118,218	$ 112,468	$ 236,088	$ 222,047
Reimbursements	12,063	7,409	22,671	14,311
Revenues	130,281	119,877	258,759	236,358
Operating expenses:
Compensation and related expenses	58,446	71,815	127,203	146,353
Other operating expenses	8,755	8,121	16,920	15,831
Reimbursable expenses	12,063	7,409	22,671	14,311
General and administrative expenses	5,740	3,160	9,971	6,433
Total operating expenses	85,004	90,505	176,765	182,928
Operating income	45,277	29,372	81,994	53,430
Other income, net:
Interest income, net	175	12	196	41
Miscellaneous income (expense), net	(10,020)	5,283	(13,951)	11,322
Total other income, net	(9,845)	5,295	(13,755)	11,363
Income before income taxes	35,432	34,667	68,239	64,793
Income taxes	9,677	9,267	12,875	8,545
Net income	$ 25,755	$ 25,400	$ 55,364	$ 56,248
Net income per share:
Basic (in dollars per share)	$ 0.50	$ 0.48	$ 1.06	$ 1.07
Diluted (in dollars per share)	$ 0.49	$ 0.48	$ 1.05	$ 1.06
Shares used in per share computations:
Basic (in shares)	51,890	52,637	52,154	52,587
Diluted (in shares)	52,394	53,285	52,725	53,313
Cash dividends declared per common share (in dollars per share)	$ 0.24	$ 0.20	$ 0.48	$ 0.40