Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2020	Jun. 28, 2019	Jul. 03, 2020	Jun. 28, 2019
Revenues:
Revenues before reimbursements	$ 87,863	$ 100,263	$ 187,583	$ 193,664
Reimbursements	4,182	6,243	10,415	11,873
Revenues	92,045	106,506	197,998	205,537
Operating expenses:
Compensation and related expenses	68,137	61,997	118,122	127,090
Other operating expenses	7,681	8,095	15,897	16,103
Reimbursable expenses	4,182	6,243	10,415	11,873
General and administrative expenses	2,925	5,348	8,456	9,894
Total operating expenses	82,925	81,683	152,890	164,960
Operating income	9,120	24,823	45,108	40,577
Other income, net:
Interest income, net	305	924	1,180	1,979
Miscellaneous income, net	11,989	3,104	(819)	9,617
Total other income, net	12,294	4,028	361	11,596
Income before income taxes	21,414	28,851	45,469	52,173
Income taxes	5,068	7,857	2,841	8,467
Net income	$ 16,346	$ 20,994	$ 42,628	$ 43,706
Net income per share:
Basic (in dollars per share)	$ 0.31	$ 0.40	$ 0.81	$ 0.83
Diluted (in dollars per share)	$ 0.31	$ 0.39	$ 0.80	$ 0.81
Shares used in per share computations:
Basic (in shares)	52,259	52,745	52,417	52,641
Diluted (in shares)	53,139	53,872	53,404	53,849
Cash dividends declared per common share (in dollars per share)	$ 0.19	$ 0.16	$ 0.38	$ 0.32