Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jun. 26, 2016	Jun. 28, 2015
Cash flows from operating activities:
Net income including noncontrolling interests	$ 52,669	$ 70,909
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	33,835	34,300
Equity in income of unconsolidated joint ventures	(1,557)	(3,097)
Distributions of earnings from unconsolidated joint ventures	2,305	3,045
Stock-based compensation	9,299	8,093
Excess tax benefits from stock-based compensation	(576)	(170)
Deferred income taxes	7,313	(9,826)
Provision for doubtful accounts	9,488	(1,866)
Fair value adjustments to contingent consideration	2,823	(3,113)
Gain on disposal of property and equipment	(777)	(5,295)
Lease termination costs and related asset impairment	2,946
Changes in operating assets and liabilities, net of effects of business acquisitions:
Accounts receivable	19,107	78,110
Prepaid expenses and other assets	(4,791)	6,023
Accounts payable	(2,566)	(36,733)
Accrued compensation	(2,035)	1,448
Billings in excess of costs on uncompleted contracts	(8,370)	(11,363)
Other liabilities	(14,976)	(21,497)
Income taxes receivable/payable	(14,335)	25,130
Net cash provided by operating activities	89,802	134,098
Cash flows from investing activities:
Capital expenditures	(10,107)	(20,262)
Payments for business acquisitions, net of cash acquired	(81,256)	(11,750)
Changes in restricted cash	(3,384)
Proceeds from sale of property and equipment	3,291	10,039
Investments in unconsolidated joint ventures	(768)
Net cash used in investing activities	(92,224)	(21,973)
Cash flows from financing activities:
Payments on long-term debt	(102,213)	(32,631)
Proceeds from borrowings	200,000	64,794
Payments of earn-out liabilities	(1,001)	(3,199)
Debt pre-payment costs	(1,935)	(1,457)
Excess tax benefits from stock-based compensation	576	170
Repurchases of common stock	(75,000)	(75,500)
Dividends paid	(14,578)	(13,440)
Net proceeds from issuance of common stock	12,679	5,621
Net cash provided by (used in) financing activities	18,528	(55,642)
Effect of foreign exchange rate changes on cash	2,486	(3,679)
Net increase in cash and cash equivalents	18,592	52,804
Cash and cash equivalents at beginning of period	135,326	122,379
Cash and cash equivalents at end of period	153,918	175,183
Cash paid during the period for:
Interest	9,089	5,084
Income taxes, net of refunds received of $3.0 million and $4.4 million	$ 29,405	$ 15,679