Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Oct. 02, 2011
Cash flows from operating activities:
Net income (loss) including noncontrolling interests	$ (1,506)	$ 104,732	$ 92,982
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	62,605	56,902	55,684
Loss on settlement of foreign currency forward contract	270	286	293
Equity in income of unconsolidated joint ventures	(3,461)	(2,916)	(4,877)
Distributions of earnings from unconsolidated joint ventures	4,458	3,194	4,802
Stock-based compensation	8,775	10,839	10,582
Excess tax benefits from stock-based compensation	(886)	(624)	(104)
Deferred income taxes	(11,468)	(5,512)	1,720
Provision for doubtful accounts	13,818	4,768	3,733
Impairment of goodwill	56,600	914
Fair value adjustments to contingent consideration	(9,560)	(19,246)	(1,755)
Fair value adjustment to assets held for sale		3,437
Foreign exchange (gain) loss	754	(139)	1,288
Lease termination costs and related asset impairment	7,188	1,261	1,281
(Gain) loss on disposal of property and equipment	(287)	191	(231)
Changes in operating assets and liabilities, net of effects of business acquisitions:
Accounts receivable	87,367	(39,960)	2,046
Prepaid expenses and other assets	(11,782)	26,284	(28,324)
Accounts payable	(34,191)	(14,529)	(34,013)
Accrued compensation	(16,385)	15,678	11,157
Billings in excess of costs on uncompleted contracts	(16,830)	2,425	(1,669)
Other liabilities	21,489	7,371	6,475
Income taxes receivable/payable	(19,218)	2,665	10,553
Net cash provided by operating activities	137,750	158,021	131,623
Cash flows from investing activities:
Capital expenditures	(27,545)	(25,106)	(18,901)
Payments for business acquisitions, net of cash acquired	(171,329)	(55,014)	(269,996)
Payment in settlement of foreign currency forward contract	(4,177)	(4,192)	(4,216)
Receipt in settlement of foreign currency forward contract	3,907	3,906	3,923
Changes in restricted cash	470		(5,000)
Investments in unconsolidated joint ventures	(20)	(430)	(530)
Proceeds from sale of property and equipment	2,089	1,037	879
Net cash used in investing activities	(196,605)	(79,799)	(293,841)
Cash flows from financing activities:
Payments on long-term debt	(171,400)	(120,792)	(43,047)
Proceeds from borrowings	296,389	52,672	67,618
Payments of earn-out liabilities	(33,672)	(18,055)
Payment of debt issuance cost	(2,136)
Distributions paid to noncontrolling interests	(445)	(9)	(1,702)
Excess tax benefits from stock-based compensation	886	624	104
Repurchases of common stock	(20,000)
Net proceeds from issuance of common stock	15,993	18,166	8,378
Net cash provided by (used in) financing activities	85,615	(67,394)	31,351
Effect of foreign exchange rate changes on cash	(2,303)	3,526	428
Net increase (decrease) in cash and cash equivalents	24,457	14,354	(130,439)
Cash and cash equivalents at beginning of year	104,848	90,494	220,933
Cash and cash equivalents at end of year	129,305	104,848	90,494
Cash paid during the year for:
Interest	5,049	5,279	4,226
Income taxes, net of refunds received	$ 35,796	$ 58,126	$ 33,715