Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 04, 2025	Mar. 29, 2024
Revenues:
Revenues before reimbursements	$ 137,437	$ 137,207
Reimbursements	8,070	7,726
Revenues	145,507	144,933
Operating expenses:
Compensation and related expenses	75,903	90,327
Other operating expenses	12,095	10,531
Reimbursable expenses	8,070	7,726
General and administrative expenses	5,007	5,636
Total operating expenses	101,075	114,220
Operating income	44,432	30,713
Other income, net:
Interest income, net	2,714	2,626
Miscellaneous income (loss), net	(9,386)	7,084
Total other income (loss), net	(6,672)	9,710
Income before income taxes	37,760	40,423
Income taxes	11,110	10,281
Net income	$ 26,650	$ 30,142
Net income per share:
Basic (in dollars per share)	$ 0.52	$ 0.59
Diluted (in dollars per share)	$ 0.52	$ 0.59
Shares used in per share computations:
Basic (in shares)	51,283	51,006
Diluted (in shares)	51,650	51,419
Cash dividends declared per common share (in dollars per share)	$ 0.3	$ 0.28