Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Apr. 01, 2016
Revenues:
Revenues before reimbursements	$ 80,467	$ 78,950
Reimbursements	3,655	4,206
Revenues	84,122	83,156
Operating expenses:
Compensation and related expenses	54,418	52,017
Other operating expenses	7,191	6,983
Reimbursable expenses	3,655	4,206
General and administrative expenses	4,224	3,514
Total operating expenses	69,488	66,720
Operating income	14,634	16,436
Other income, net:
Interest income, net	234	139
Miscellaneous income, net	2,542	1,159
Total	2,776	1,298
Income before income taxes	17,410	17,734
Income taxes	834	2,384
Net income	$ 16,576	$ 15,350
Net income per share:
Basic	$ 0.63	$ 0.58
Diluted	$ 0.61	$ 0.56
Shares used in per share computations:
Basic	26,302	26,513
Diluted	26,981	27,239
Cash dividends declared per common share	$ 0.21	$ 0.18