Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 28, 2018	Dec. 29, 2017	Dec. 30, 2016
Revenues:
Revenue Before Reimbursements		$ 354,639	$ 329,664	$ 299,197
Reimbursements		24,884	18,135	15,879
Revenues	[1]	379,523	347,799	315,076
Operating expenses:
Compensation and related expenses		215,052	210,289	193,397
Other operating expenses		30,599	29,544	28,397
Reimbursable expenses		24,884	18,135	15,879
General and administrative expenses		17,532	17,780	15,492
Total operating expenses		288,067	275,748	253,165
Operating income		91,456	72,051	61,911
Other income:
Interest income		2,751	1,294	683
Miscellaneous income, net		(890)	9,164	6,528
Income before income taxes		93,317	82,509	69,122
Provision for income taxes		21,063	41,204	21,642
Net income		$ 72,254	$ 41,305	$ 47,480
Net income per share:
Basic		$ 1.37	$ 0.78	$ 0.90
Diluted		$ 1.33	$ 0.77	$ 0.87
Shares used in per share computations:
Basic		52,906	52,724	52,976
Diluted		54,168	53,972	54,332
Cash dividends declared per common share		$ 0.52	$ 0.42	$ 0.36

[1] Geographic revenues are allocated based on the location of the client.