Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Apr. 02, 2017	Mar. 27, 2016
Cash flows from operating activities:
Net income including noncontrolling interests	$ 53,456	$ 26,978
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	23,234	21,410
Equity in income of unconsolidated joint ventures	(2,489)	(896)
Distributions of earnings from unconsolidated joint ventures	2,301	1,334
Stock-based compensation	6,610	6,147
Excess tax benefits from stock-based compensation		(211)
Deferred income taxes	19,851	7,109
Provision for doubtful accounts	(2,028)	8,047
Fair value adjustments to contingent consideration	(7,149)	2,823
Gain on disposal of property and equipment	(266)	(359)
Lease termination costs and related asset impairment		2,946
Changes in operating assets and liabilities, net of effects of business acquisitions:
Accounts receivable	2,631	35,898
Prepaid expenses and other assets	(7,587)	(8,694)
Accounts payable	(15,587)	(27,176)
Accrued compensation	(12,888)	(23,038)
Billings in excess of costs on uncompleted contracts	25,139	(9,646)
Other liabilities	(5,021)	3,330
Income taxes receivable/payable	(29,843)	(15,760)
Net cash provided by operating activities	50,364	30,242
Cash flows from investing activities:
Capital expenditures	(3,896)	(6,007)
Payments for business acquisitions, net of cash acquired	(8,039)	(81,256)
Changes in restricted cash		(3,384)
Proceeds from sale of property and equipment	303	969
Investments in unconsolidated joint ventures		(613)
Net cash used in investing activities	(11,632)	(90,291)
Cash flows from financing activities:
Payments on long-term debt	(137,849)	(76,717)
Proceeds from borrowings	133,596	170,000
Payments of earn-out liabilities		(1,001)
Debt pre-payment costs		(1,935)
Excess tax benefits from stock-based compensation		211
Repurchases of common stock	(20,000)	(50,000)
Dividends paid	(10,301)	(9,382)
Net proceeds from issuance of common stock	7,661	6,235
Net cash (used in) provided by financing activities	(26,893)	37,411
Effect of foreign exchange rate changes on cash	(958)	979
Net increase (decrease) in cash and cash equivalents	10,881	(21,659)
Cash and cash equivalents at beginning of period	160,459	135,326
Cash and cash equivalents at end of period	171,340	113,667
Cash paid during the period for:
Interest	5,970	7,120
Income taxes, net of refunds received of $0.6 million and $2.1 million	$ 32,995	$ 19,855