Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jul. 02, 2011	May 14, 2010	Jul. 02, 2011	May 14, 2010
Revenues	$ 80,641	$ 68,075	$ 159,248	$ 126,921
Costs of services	53,731	50,055	105,291	90,509
Gross profit	26,910	18,020	53,957	36,412
Selling, general and administrative expenses	18,688	17,475	36,516	33,269
Depreciation and amortization	1,252	1,467	2,551	2,725
Income (loss) from operations	6,970	(922)	14,890	418
Interest income	79	79	161	158
Interest expense	(331)	(799)	(723)	(1,669)
Gain (loss) on the extinguishment of convertible debentures	3	(425)	3	(425)
Other income (expense)	43	(90)	(103)	(104)
Income (loss) before (provision) benefit for income taxes	6,764	(2,157)	14,228	(1,622)
(Provision) benefit for income taxes	(2,728)	577	(5,731)	141
Net income (loss)	4,036	(1,580)	8,497	(1,481)
Net loss attributable to noncontrolling interest, net of tax	271	57	245	224
Net income (loss) attributable to CRA International, Inc.	$ 4,307	$ (1,523)	$ 8,742	$ (1,257)
Net income (loss) per share attributable to CRA International, Inc:
Basic (in dollars per share)	$ 0.40	$ (0.14)	$ 0.82	$ (0.12)
Diluted (in dollars per share)	$ 0.40	$ (0.14)	$ 0.81	$ (0.12)
Weighted average number of shares outstanding:
Basic (in shares)	10,650	10,713	10,632	10,683
Diluted (in shares)	10,820	10,713	10,810	10,683