Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net income (loss) including noncontrolling interests	$ 108,675	$ (1,506)	$ 104,732
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	54,540	62,605	56,902
Loss on settlement of foreign currency forward contract		270	286
Equity in income of unconsolidated joint ventures	(2,804)	(3,461)	(2,916)
Distributions of earnings from unconsolidated joint ventures	2,724	4,458	3,194
Stock-based compensation	10,374	8,775	10,839
Excess tax benefits from stock-based compensation	(904)	(886)	(624)
Deferred income taxes	(145)	(11,468)	(5,512)
Provision for doubtful accounts	1,467	13,818	4,768
Impairment of goodwill		56,600	914
Fair value adjustments to contingent consideration	(58,694)	(9,560)	(19,246)
Fair value adjustment to assets held for sale			3,437
Foreign exchange (gain) loss	(104)	754	(139)
Lease termination costs and related asset impairment	2,416	7,188	1,261
(Gain) loss on disposal of property and equipment	58	(287)	191
Changes in operating assets and liabilities, net of effects of business acquisitions:
Accounts receivable	(32,020)	87,367	(39,960)
Prepaid expenses and other assets	(4,481)	(11,782)	26,284
Accounts payable	31,772	(34,191)	(14,529)
Accrued compensation	(4,728)	(16,385)	15,678
Billings in excess of costs on uncompleted contracts	23,833	(16,830)	2,425
Other liabilities	(9,315)	21,489	7,371
Income taxes receivable/payable	4,712	(19,218)	2,665
Net cash provided by operating activities	127,376	137,750	158,021
Cash flows from investing activities:
Capital expenditures	(19,404)	(27,545)	(25,106)
Payments for business acquisitions, net of cash acquired	(30,230)	(171,329)	(55,014)
Payment in settlement of foreign currency forward contract		(4,177)	(4,192)
Receipt in settlement of foreign currency forward contract		3,907	3,906
Changes in restricted cash		470
Investments in unconsolidated joint ventures	(21)	(20)	(430)
Proceeds from sale of property and equipment	4,594	2,089	1,037
Payment received on note for sale of operation	3,900
Net cash used in investing activities	(41,161)	(196,605)	(79,799)
Cash flows from financing activities:
Payments on long-term debt	(4,379)	(171,400)	(120,792)
Proceeds from borrowings		296,389	52,672
Payments of earn-out liabilities	(18,663)	(33,672)	(18,055)
Payment of debt issuance cost		(2,136)
Distributions paid to noncontrolling interests	(417)	(445)	(9)
Excess tax benefits from stock-based compensation	904	886	624
Repurchases of common stock	(80,000)	(20,000)
Net proceeds from issuance of common stock	23,834	15,993	18,166
Dividend paid	(8,956)
Net cash provided by (used in) financing activities	(87,677)	85,615	(67,394)
Effect of foreign exchange rate changes on cash	(5,464)	(2,303)	3,526
Net increase (decrease) in cash and cash equivalents	(6,926)	24,457	14,354
Cash and cash equivalents at beginning of year	129,305	104,848	90,494
Cash and cash equivalents at end of year	122,379	129,305	104,848
Cash paid during the year for:
Interest	8,293	5,049	5,279
Income taxes, net of refunds received	$ 28,092	$ 35,796	$ 58,126