CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net income including noncontrolling interest	$ 55,721	$ 61,938	$ 64,053
Adjustments to reconcile net income including noncontrolling interest to net cash provided by operating activities:
Depreciation and amortization	11,421	9,369	7,342
Share-based compensation	11,674	14,097	13,676
Loss on disposal of property and equipment	249	0	0
Provision for doubtful accounts	728	231	231
Benefit from deferred income taxes	(8,613)	(6,806)	(3,217)
Income tax benefit from exercise of stock options granted prior to January 1, 2006	693	338	1,650
Excess tax deficit (benefit) from share-based compensation arrangements	1,308	748	(67)
Realized foreign exchange gain on forward contracts	0	(586)	0
Changes in operating assets and liabilities:
Increase in accounts receivable	(9,576)	(10,130)	(7,549)
(Increase) decrease in royalties receivable	(170)	(28)	4,898
(Increase) decrease in inventories	(9,453)	539	(916)
Increase in deferred cost of goods sold	(9,594)	(409)	(4,526)
(Increase) decrease in prepaid expenses	(2,792)	186	(1,874)
(Increase) decrease in prepaid income taxes	(1,660)	1,255	366
Decrease (increase) in other assets	2,206	(2,193)	(1,502)
Increase (decrease) in accounts payable	968	(1,726)	5,159
Increase (decrease) in accrued compensation	4,557	4,827	(1,333)
Increase in accrued liabilities	6,406	2,939	2,515
(Decrease) increase in income taxes payable	(381)	198	(89)
Increase (decrease) in deferred revenue	1,467	2,850	(921)
(Decrease) increase in other liabilities	(842)	(2,203)	1,061
Net cash provided by operating activities	54,317	75,434	78,957
Cash flows from investing activities:
Purchases of property and equipment	(9,090)	(10,828)	(5,057)
Increase in intangible assets	(3,926)	(3,664)	(2,451)
Cash paid for acquisitions, net of cash acquired	0	(37,399)	0
Net cash used in investing activities	(13,016)	(51,891)	(7,508)
Cash flows from financing activities:
Repayments on capital lease obligations	(132)	(26)	(50)
Proceeds from issuance of common stock	3,289	1,642	5,943
Excess tax (deficit) benefit from share-based compensation arrangements	(1,308)	(748)	67
Dividends paid	0	(57,275)	0
Repurchases of common stock	(19,790)	(26,268)	(36,187)
Short swing profit recovery	0	0	73
Net proceeds from settlement of forward contracts	0	586	0
Net cash used in financing activities	(17,941)	(82,089)	(30,154)
Effect of foreign currency exchange rates on cash	552	218	282
Net increase (decrease) in cash and cash equivalents	23,912	(58,328)	41,577
Cash and cash equivalents at beginning of period	71,554	129,882	88,305
Cash and cash equivalents at end of period	95,466	71,554	129,882
Cash paid for:
Interest	28	44	116
Income taxes	29,979	28,691	22,823
Noncash investing and financing activities:
Assets acquired under capital leases	$ 352	$ 21	$ 0