Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 03, 2014		Dec. 28, 2012		Dec. 30, 2011
Revenues:
Revenues before reimbursements	$ 280,043		$ 266,562		$ 246,667
Reimbursements	16,125		26,091		25,779
Revenues	296,168	[1]	292,653	[1]	272,446	[1]
Operating expenses:
Compensation and related expenses	184,084		171,809		156,853
Other operating expenses	25,299		23,574		23,238
Reimbursable expenses	16,125		26,091		25,779
General and administrative expenses	14,714		13,559		13,116
Total operating expenses	240,222		235,033		218,986
Operating income	55,946		57,620		53,460
Other income:
Interest income	127		328		236
Miscellaneous income, net	7,872		3,801		1,123
Income before income taxes	63,945		61,749		54,819
Provision for income taxes	25,305		24,524		22,124
Net income	$ 38,640		$ 37,225		$ 32,695
Net income per share:
Basic	$ 2.84		$ 2.70		$ 2.31
Diluted	$ 2.76		$ 2.60		$ 2.22
Shares used in per share computations:
Basic	13,616		13,780		14,181
Diluted	14,025		14,293		14,751

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