Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 29, 2013
Cash flows from operating activities:
Net income (loss) including noncontrolling interests	$ 39,228	$ 108,675	$ (1,506)
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	44,201	54,540	62,605
Loss on settlement of foreign currency forward contract			270
Equity in income of unconsolidated joint ventures	(5,131)	(2,804)	(3,461)
Distributions of earnings from unconsolidated joint ventures	5,252	2,724	4,458
Stock-based compensation	10,926	10,374	8,775
Excess tax benefits from stock-based compensation	(172)	(904)	(886)
Deferred income taxes	8,412	(145)	(11,468)
Provision for doubtful accounts	(1,034)	1,467	13,818
Impairment of goodwill and other intangible assets	60,763		56,600
Fair value adjustments to contingent consideration	(3,113)	(58,694)	(9,560)
Foreign exchange (gain) loss	(275)	(104)	754
Lease termination costs and related asset impairment	342	2,416	7,188
(Gain) loss on disposal of property and equipment	(6,014)	58	(287)
Changes in operating assets and liabilities, net of effects of business acquisitions:
Accounts receivable	40,345	(32,020)	87,367
Prepaid expenses and other assets	12,970	(4,481)	(11,782)
Accounts payable	(26,901)	31,772	(34,191)
Accrued compensation	(7,676)	(4,728)	(16,385)
Billings in excess of costs on uncompleted contracts	(10,319)	23,833	(16,830)
Other liabilities	(6,868)	(9,315)	21,489
Income taxes receivable/payable	7,911	4,712	(19,218)
Net cash provided by operating activities	162,847	127,376	137,750
Cash flows from investing activities:
Capital expenditures	(24,296)	(19,404)	(27,545)
Payments for business acquisitions, net of cash acquired	(11,680)	(30,251)	(171,349)
Payment in settlement of foreign currency forward contract			(4,177)
Receipt in settlement of foreign currency forward contract			3,907
Changes in restricted cash	4,530		470
Proceeds from sale of property and equipment	10,426	4,594	2,089
Payment received on note for sale of operation		3,900
Net cash used in investing activities	(21,020)	(41,161)	(196,605)
Cash flows from financing activities:
Payments on long-term debt	(75,459)	(4,379)	(171,400)
Proceeds from borrowings	64,794		296,389
Payments of earn-out liabilities	(3,199)	(18,663)	(33,672)
Payment of debt issuance costs	(1,457)		(2,136)
Distributions paid to noncontrolling interests	(515)	(417)	(445)
Excess tax benefits from stock-based compensation	172	904	886
Repurchases of common stock	(100,500)	(80,000)	(20,000)
Net proceeds from issuance of common stock	10,825	23,834	15,993
Dividend paid	(18,240)	(8,956)
Net cash provided by (used in) financing activities	(123,579)	(87,677)	85,615
Effect of foreign exchange rate changes on cash	(5,301)	(5,464)	(2,303)
Net increase (decrease) in cash and cash equivalents	12,947	(6,926)	24,457
Cash and cash equivalents at beginning of year	122,379	129,305	104,848
Cash and cash equivalents at end of year	135,326	122,379	129,305
Cash paid during the year for:
Interest	7,323	8,293	5,049
Income taxes, net of refunds of $5.4 million, $14.7 million and $6.7 million	$ 23,268	$ 28,092	$ 35,796