CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010
Cash flows from operating activities:
Net income	$ 16,220	$ 13,519
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property, equipment and leasehold improvements	2,132	2,151
Amortization of premiums and accretion of discounts on short-term investments	57	31
Deferred rent	(240)	717
Provision for doubtful accounts	746	956
Stock-based compensation	5,934	5,093
Deferred income tax provision	(2,517)	(1,795)
Tax benefit for stock plans	(2,227)	(2,287)
Changes in operating assets and liabilities:
Accounts receivable	(5,449)	(9,912)
Prepaid expenses and other assets	3,363	(7,536)
Accounts payable and accrued liabilities	1,183	4,500
Accrued payroll and employee benefits	(4,609)	47
Deferred revenues	(1,300)	1,078
Net cash provided by operating activities	13,293	6,562
Cash flows from investing activities:
Capital expenditures	(1,667)	(1,335)
Purchase of short-term investments	(25,581)
Maturity of short-term investments		5,080
Net cash (used in) provided by investing activities	(27,248)	3,745
Cash flows from financing activities:
Tax benefit for stock plans	2,227	2,287
Payroll taxes for restricted stock units	(3,473)	(1,896)
Repurchase of common stock	(23,080)	(6,356)
Exercise of share-based payment awards	894	2,051
Net cash used in financing activities	(23,432)	(3,914)
Effect of foreign currency exchange rates on cash and cash equivalents	291	(217)
Net (decrease) increase in cash and cash equivalents	(37,096)	6,176
Cash and cash equivalents at beginning of period	106,549	67,895
Cash and cash equivalents at end of period	$ 69,453	$ 74,071