Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2018	Dec. 29, 2017	Dec. 30, 2016
Cash flows from operating activities:
Net income	$ 72,254	$ 41,305	$ 47,480
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property, equipment and leasehold improvements	6,292	6,285	6,131
Amortization of premiums and accretion of discounts on short-term investments	(114)	0	2
Deferred rent expense	175	(362)	(340)
Provision for contract losses and doubtful accounts	1,848	2,506	2,452
Stock-based compensation	16,993	16,155	13,333
Deferred income tax provision	(3,715)	11,786	(2,602)
Changes in operating assets and liabilities:
Accounts receivable	2,438	(25,197)	(1,284)
Prepaid expenses and other assets	(11,047)	2,867	(598)
Accounts payable and accrued liabilities	(4,620)	5,984	(370)
Accrued payroll and employee benefits	9,820	5,831	2,920
Deferred revenues	864	678	(178)
Net cash provided by operating activities	91,188	67,838	66,946
Cash flows from investing activities:
Capital expenditures	(16,298)	(4,725)	(14,393)
Purchase of short-term investments	(52,522)	(28,997)	(51,000)
Maturity of short-term investments	43,000	16,000	37,950
Net cash used in investing activities	(25,820)	(17,722)	(27,443)
Cash flows from financing activities:
Payroll taxes for restricted stock units	(8,839)	(9,520)	(7,685)
Repurchase of common stock	(27,915)	(11,931)	(24,456)
Exercise of share-based payment awards	1,474	2,025	1,756
Dividends and dividend equivalent rights	(27,220)	(21,835)	(18,781)
Net cash used in financing activities	(62,500)	(41,261)	(49,166)
Effect of foreign currency exchange rates on cash and cash equivalents	(603)	972	(1,121)
Net increase (decrease) in cash and cash equivalents	2,265	9,827	(10,784)
Cash and cash equivalents at beginning of year	124,794	114,967	125,751
Cash and cash equivalents at end of year	$ 127,059	$ 124,794	$ 114,967