Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Sep. 28, 2014
Cash flows from operating activities:
Net income including noncontrolling interests	$ 83,853	$ 39,228	$ 108,675
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	45,588	44,201	54,540
Equity in income of unconsolidated joint ventures	(1,652)	(5,131)	(2,804)
Distributions of earnings from unconsolidated joint ventures	2,796	5,252	2,724
Stock-based compensation	12,964	10,926	10,374
Excess tax benefits from stock-based compensation	(918)	(172)	(904)
Deferred income taxes	6,051	8,412	(145)
Provision for doubtful accounts	8,082	(1,034)	1,467
Impairment of goodwill and other intangible assets		60,763
Fair value adjustments to contingent consideration	2,823	(3,113)	(58,694)
Lease termination costs and related asset impairment	2,946	342	2,416
(Gain) loss on disposal of property and equipment	(537)	(6,014)	58
Changes in operating assets and liabilities, net of effects of business acquisitions:
Accounts receivable	9,062	40,345	(32,020)
Prepaid expenses and other assets	3,720	12,970	(4,481)
Accounts payable	(3,002)	(26,901)	31,772
Accrued compensation	8,434	(7,676)	(4,728)
Billings in excess of costs on uncompleted contracts	(13,874)	(10,319)	23,833
Other liabilities	(19,321)	(7,143)	(9,419)
Income taxes receivable/payable	(4,995)	7,911	4,712
Net cash provided by operating activities	142,020	162,847	127,376
Cash flows from investing activities:
Capital expenditures	(11,945)	(24,296)	(19,404)
Payments for business acquisitions, net of cash acquired	(81,259)	(11,680)	(30,251)
Changes in restricted cash	(2,519)	4,530
Proceeds from sale of property and equipment	3,076	10,426	4,594
Payment received on note from sale of operation			3,900
Investments in unconsolidated joint ventures	(1,368)
Net cash used in investing activities	(94,015)	(21,020)	(41,161)
Cash flows from financing activities:
Payments on long-term debt	(148,485)	(75,459)	(4,379)
Proceeds from borrowings	229,049	64,794
Payments of contingent earn-out liabilities	(3,251)	(3,199)	(18,663)
Debt pre-payment costs	(1,935)	(1,457)
Distributions paid to noncontrolling interests	(402)	(515)	(417)
Excess tax benefits from stock-based compensation	918	172	904
Repurchases of common stock	(99,500)	(100,500)	(80,000)
Net proceeds from issuance of common stock	17,953	10,825	23,834
Dividends paid	(19,735)	(18,240)	(8,956)
Net cash used in financing activities	(25,388)	(123,579)	(87,677)
Effect of foreign exchange rate changes on cash	2,516	(5,301)	(5,464)
Net increase (decrease) in cash and cash equivalents	25,133	12,947	(6,926)
Cash and cash equivalents at beginning of year	135,326	122,379	129,305
Cash and cash equivalents at end of year	160,459	135,326	122,379
Cash paid during the period for:
Interest	12,575	7,323	8,293
Income taxes, net of refunds of $3.2 million, $5.4 million and $14.7 million	$ 35,273	$ 23,268	$ 28,092