Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 01, 2021	Jan. 03, 2020	Dec. 28, 2018
Revenues:
Revenues before reimbursements	$ 378,412	$ 391,390	$ 354,639
Reimbursements	21,488	25,809	24,884
Revenues	399,900	417,199	379,523
Operating expenses:
Compensation and related expenses	250,041	252,197	215,052
Other operating expenses	32,234	33,562	30,599
Reimbursable expenses	21,488	25,809	24,884
General and administrative expenses	12,888	20,520	17,532
Total operating expenses	316,651	332,088	288,067
Operating income	83,249	85,111	91,456
Other income:
Interest income	1,705	3,912	2,751
Miscellaneous income (loss), net	11,982	15,167	(890)
Income before income taxes	96,936	104,190	93,317
Provision for income taxes	14,384	21,730	21,063
Net income	$ 82,552	$ 82,460	$ 72,254
Net income per share:
Basic (in dollars per share)	$ 1.58	$ 1.56	$ 1.37
Diluted (in dollars per share)	$ 1.55	$ 1.53	$ 1.33
Shares used in per share computations:
Basic (in shares)	52,388	52,691	52,906
Diluted (in shares)	53,323	53,884	54,168
Cash dividends declared per common share (in dollars per share)	$ 0.76	$ 0.64	$ 0.52