Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 03, 2015	Jul. 04, 2014
Cash flows from operating activities:
Net income	$ 22,030	$ 20,418
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property, equipment and leasehold improvements	2,705	2,633
Amortization of premiums and accretion of discounts on short-term investments	395	443
Deferred rent	(7)	(132)
Provision for doubtful accounts and contract losses	509	828
Stock-based compensation	7,902	7,875
Deferred income tax provision	(1,071)	(3,896)
Excess tax benefit from equity incentive plans	(4,486)	(5,090)
Changes in operating assets and liabilities:
Accounts receivable	(7,684)	(9,643)
Prepaid expenses and other assets	1,195	(3,348)
Accounts payable and accrued liabilities	5,117	6,504
Accrued payroll and employee benefits	(9,446)	(6,027)
Deferred revenues	(2,339)	165
Net cash provided by operating activities	14,820	10,730
Cash flows from investing activities:
Capital expenditures	(1,714)	(1,976)
Purchase of short-term investments	(4,000)	(1,067)
Maturity of short-term investments	10,555	2,186
Net cash provided by (used in) investing activities	4,841	(857)
Cash flows from financing activities:
Excess tax benefit from equity incentive plans	4,486	5,090
Payroll taxes for restricted stock units	(7,284)	(6,267)
Repurchase of common stock	(7,004)	(14,383)
Exercise of share-based payment awards	631	1,540
Dividends and dividend equivalents rights	(8,007)	(6,580)
Net cash used in financing activities	(17,178)	(20,600)
Effect of foreign currency exchange rates on cash and cash equivalents	(46)	674
Net increase (decrease) in cash and cash equivalents	2,437	(10,053)
Cash and cash equivalents at beginning of period	129,490	122,948
Cash and cash equivalents at end of period	$ 131,927	$ 112,895