Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 02, 2015	Oct. 03, 2014
Cash flows from operating activities:
Net income	$ 33,749	$ 31,458
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property, equipment and leasehold improvements	4,034	3,979
Amortization of premiums and accretion of discounts on short-term investments	515	660
Deferred rent	(80)	(170)
Provision for doubtful accounts and contract losses	785	1,234
Stock-based compensation	10,536	10,585
Deferred income tax provision	(869)	(6,046)
Excess tax benefit from equity incentive plans	(4,983)	(5,126)
Changes in operating assets and liabilities:
Accounts receivable	(8,585)	(13,343)
Prepaid expenses and other assets	1,206	(2,877)
Accounts payable and accrued liabilities	4,236	6,314
Accrued payroll and employee benefits	(3,900)	331
Deferred revenues	(2,334)	(923)
Net cash provided by operating activities	34,310	26,076
Cash flows from investing activities:
Capital expenditures	(4,355)	(3,906)
Purchase of short-term investments	(16,000)	(1,067)
Maturity of short-term investments	13,555	7,586
Net cash (used in) provided by investing activities	(6,800)	2,613
Cash flows from financing activities:
Excess tax benefit from equity incentive plans	4,983	5,126
Payroll taxes for restricted stock units	(7,365)	(6,356)
Repurchase of common stock	(19,814)	(26,372)
Exercise of share-based payment awards	1,547	1,811
Dividends and dividend equivalents rights	(11,780)	(9,842)
Net cash used in financing activities	(32,429)	(35,633)
Effect of foreign currency exchange rates on cash and cash equivalents	(114)	(390)
Net decrease in cash and cash equivalents	(5,033)	(7,334)
Cash and cash equivalents at beginning of period	129,490	122,948
Cash and cash equivalents at end of period	$ 124,457	$ 115,614