Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2025	Jun. 28, 2024	Jul. 04, 2025	Jun. 28, 2024
Revenues:
Revenues before reimbursements	$ 132,868	$ 132,434	$ 270,305	$ 269,641
Reimbursements	9,094	8,102	17,164	15,828
Revenues	141,962	140,536	287,469	285,469
Operating expenses:
Compensation and related expenses	97,474	79,466	173,377	169,793
Other operating expenses	12,072	11,185	24,167	21,716
Reimbursable expenses	9,094	8,102	17,164	15,828
General and administrative expenses	6,145	6,039	11,152	11,675
Total operating expenses	124,785	104,792	225,860	219,012
Operating income	17,177	35,744	61,609	66,457
Other income, net:
Interest income, net	2,344	2,231	5,058	4,857
Miscellaneous income, net	17,294	1,707	7,908	8,791
Total other income, net	19,638	3,938	12,966	13,648
Income before income taxes	36,815	39,682	74,575	80,105
Income taxes	10,262	10,455	21,372	20,736
Net income	$ 26,553	$ 29,227	$ 53,203	$ 59,369
Net income per share:
Basic (in dollars per share)	$ 0.52	$ 0.57	$ 1.04	$ 1.16
Diluted (in dollars per share)	$ 0.52	$ 0.57	$ 1.03	$ 1.15
Shares used in per share computations:
Basic (in shares)	51,185	51,111	51,234	51,059
Diluted (in shares)	51,502	51,517	51,587	51,475
Cash dividends declared per common share (in dollars per share)	$ 0.3	$ 0.28	$ 0.6	$ 0.56