Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 04, 2014	Mar. 29, 2013
Cash flows from operating activities:
Net income	$ 9,154	$ 7,976
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization of property, equipment and leasehold improvements	1,322	1,149
Amortization of premiums and accretion of discounts on short-term investments	225	79
Deferred rent	(99)	61
Provision for doubtful accounts	249	135
Stock-based compensation	5,293	5,291
Deferred income tax provision	(3,324)	(1,254)
Excess tax benefit from equity awards	(4,499)	(3,774)
Changes in operating assets and liabilities:
Accounts receivable	(8,215)	4,674
Prepaid expenses and other assets	(4,988)	(3,121)
Accounts payable and accrued liabilities	8,167	240
Accrued payroll and employee benefits	(9,838)	(15,401)
Deferred revenues	433	(1,237)
Net cash used in operating activities	(6,120)	(5,182)
Cash flows from investing activities:
Capital expenditures	(915)	(1,959)
Maturity of short-term investments	1,140	11,240
Net cash provided by investing activities	225	9,281
Cash flows from financing activities:
Excess tax benefit from equity awards	4,499	3,774
Payroll taxes for restricted stock units	(6,267)	(6,119)
Repurchase of common stock	(6,831)	(11,490)
Exercise of share-based payment awards	329	612
Dividends paid	(3,310)	(1,969)
Net cash used in financing activities	(11,580)	(15,192)
Effect of foreign currency exchange rates on cash and cash equivalents	148	(674)
Net decrease in cash and cash equivalents	(17,327)	(11,767)
Cash and cash equivalents at beginning of period	122,948	113,268
Cash and cash equivalents at end of period	$ 105,621	$ 101,501