Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 24, 2017	Sep. 25, 2016
Operating activities
Net income before attribution to noncontrolling interests	$ 77,550	$ 74,813
Adjustments to reconcile net income to net cash provided by operating activities:
Provision (credit) for uncollectible accounts and notes receivable	(353)	153
Depreciation and amortization	32,292	30,389
Deferred income taxes	1,283	4,966
Stock-based compensation expense	8,094	7,525
Other	3,004	2,811
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(5,131)	3,867
Income taxes receivable	1,795	5,045
Inventories	(3,234)	(2,673)
Prepaid expenses	9,262	4,755
Other current assets	(1,297)	872
Other assets and liabilities	(4,092)	(3,085)
Accounts payable	(2,480)	(6,290)
Income and other taxes payable	1,779	3,381
Accrued expenses and other current liabilities	(3,229)	(6,484)
Deferred revenue	(326)	1,411
Net cash provided by operating activities	114,917	121,456
Investing activities
Purchases of property and equipment	(43,195)	(38,954)
Loans issued	(2,376)	(2,216)
Repayments of loans issued	3,151	6,449
Acquisitions, net of cash acquired	(21)	(11,202)
Other	25	193
Net cash used in investing activities	(42,416)	(45,730)
Financing activities
Proceeds from issuance of term loan	400,000
Net (repayments) proceeds of revolving credit facility	(300,575)	56,375
Debt issuance costs	(3,181)
Cash dividends paid	(22,886)	(20,523)
Tax payments for equity award issuances	(2,411)	(5,999)
Proceeds from exercise of stock options	5,974	5,377
Acquisition of Company common stock	(121,705)	(109,407)
Distributions to noncontrolling interest holders	(4,606)	(3,830)
Other	580	481
Net cash used in financing activities	(48,810)	(77,526)
Effect of exchange rate changes on cash and cash equivalents	289	(99)
Change in cash and cash equivalents	23,980	(1,899)
Cash and cash equivalents at beginning of period	15,563	21,006
Cash and cash equivalents at end of period	$ 39,543	$ 19,107