Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 29, 2019	Mar. 30, 2018
Revenues:
Revenues before reimbursements	$ 93,401	$ 90,684
Reimbursements	5,630	5,773
Revenues	99,031	96,457
Operating expenses:
Compensation and related expenses	65,093	57,579
Other operating expenses	8,008	7,465
Reimbursable expenses	5,630	5,773
General and administrative expenses	4,546	4,042
Total operating expenses	83,277	74,859
Operating income	15,754	21,598
Other income, net:
Interest income, net	1,055	530
Miscellaneous income, net	6,513	322
Total other income, net	7,568	852
Income before income taxes	23,322	22,450
Income taxes	610	2,110
Net income	$ 22,712	$ 20,340
Net income per share:
Basic (in dollars per share)	$ 0.43	$ 0.39
Diluted (in dollars per share)	$ 0.42	$ 0.38
Shares used in per share computations:
Basic (in shares)	52,536	52,744
Diluted (in shares)	53,814	54,012
Cash dividends declared per common share (in dollars per share)	$ 0.16	$ 0.13