CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
CONSOLIDATED STATEMENTS OF OPERATIONS
Revenues	$ 278,432	$ 270,390	$ 305,228
Costs of services	189,262	182,381	199,383
Gross profit	89,170	88,009	105,845
Selling, general and administrative expenses	64,242	67,235	71,752
Depreciation and amortization	6,411	7,190	5,029
Goodwill impairment	0	71,394	0
Income (loss) from operations	18,517	(57,810)	29,064
Interest income	155	264	332
Interest expense	(574)	(300)	(908)
Other expense, net	(180)	(177)	(405)
Income (loss) before (provision) benefit for income taxes	17,918	(58,023)	28,083
(Provision) benefit for income taxes	(6,683)	5,180	(11,138)
Net income (loss)	11,235	(52,843)	16,945
Net (income) loss attributable to noncontrolling interest, net of tax	135	(147)	(94)
Net income (loss) attributable to CRA International, Inc.	$ 11,370	$ (52,990)	$ 16,851
Net income (loss) per share attributable to CRA International, Inc.:
Basic (in dollars per share)	$ 1.13	$ (5.21)	$ 1.60
Diluted (in dollars per share)	$ 1.12	$ (5.21)	$ 1.57
Weighted average number of shares outstanding:
Basic (in shares)	10,084	10,167	10,555
Diluted (in shares)	10,173	10,167	10,739