Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 03, 2020	Dec. 28, 2018	Dec. 29, 2017
Revenues:
Revenues before reimbursements	$ 391,390	$ 354,639	$ 329,664
Reimbursements	25,809	24,884	18,135
Revenues	417,199	379,523	347,799
Operating expenses:
Compensation and related expenses	252,197	215,052	210,289
Other operating expenses	33,562	30,599	29,544
Reimbursable expenses	25,809	24,884	18,135
General and administrative expenses	20,520	17,532	17,780
Total operating expenses	332,088	288,067	275,748
Operating income	85,111	91,456	72,051
Other income:
Interest income	3,912	2,751	1,294
Miscellaneous income (loss), net	15,167	(890)	9,164
Income before income taxes	104,190	93,317	82,509
Provision for income taxes	21,730	21,063	41,204
Net income	$ 82,460	$ 72,254	$ 41,305
Net income per share:
Basic (in dollars per share)	$ 1.56	$ 1.37	$ 0.78
Diluted (in dollars per share)	$ 1.53	$ 1.33	$ 0.77
Shares used in per share computations:
Basic (in shares)	52,691	52,906	52,724
Diluted (in shares)	53,884	54,168	53,972
Cash dividends declared per common share (in dollars per share)	$ 0.64	$ 0.52	$ 0.42