Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Oct. 02, 2016
Cash flows from operating activities:
Net income	$ 136,957	$ 117,917	$ 83,853
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	38,636	45,756	45,588
Equity in income of unconsolidated joint ventures, net of distributions	(568)	(647)	1,144
Non-cash stock compensation	19,582	13,450	12,964
Excess tax benefits from stock-based compensation			(918)
Deferred income taxes	(29,360)	(9,957)	6,051
Provision for doubtful accounts	7,167	2,847	8,082
Fair value adjustments to contingent consideration	4,252	(6,923)	2,823
Lease termination costs and related asset impairment	0	0	2,946
Loss (gain) on sale of assets and divested business	1,045	(103)	(537)
Changes in operating assets and liabilities, net of effects of business acquisitions and divestitures:
Accounts receivable	(46,273)	(64,781)	9,062
Prepaid expenses and other assets	(12,638)	(8,317)	3,720
Accounts payable	(16,032)	18,597	(3,002)
Accrued compensation	27,492	13,413	8,434
Billings in excess of costs on uncompleted contracts	15,228	28,298	(13,874)
Other liabilities	16,127	2,167	(19,321)
Income taxes receivable/payable	17,596	(13,725)	(4,995)
Cash settled contingent earn-out liability	(2,349)	0	0
Net cash provided by operating activities	176,862	137,992	142,020
Cash flows from investing activities:
Capital expenditures	(9,726)	(9,741)	(11,945)
Payments for business acquisitions, net of cash acquired	(68,256)	(8,039)	(81,259)
Changes in restricted cash	0	0	(2,519)
Investments in unconsolidated joint ventures	0	(85)	(1,368)
Proceeds from sale of assets and divested business, net	35,348	905	3,076
Net cash used in investing activities	(42,634)	(16,960)	(94,015)
Cash flows from financing activities:
Payments on long-term debt	(485,946)	(233,889)	(148,887)
Proceeds from borrowings	401,965	243,553	229,049
Payments of contingent earn-out liabilities	(1,412)	(1,319)	(3,251)
Debt pre-payment costs	(1,737)	0	(1,935)
Excess tax benefits from stock-based compensation			918
Repurchases of common stock	(75,000)	(100,000)	(99,500)
Net proceeds from issuance of common stock	13,520	18,555	17,953
Dividends paid	(24,477)	(21,672)	(19,735)
Net cash used in financing activities	(173,087)	(94,772)	(25,388)
Effect of exchange rate changes on cash	(4,931)	3,256	2,516
Net increase (decrease) in cash and cash equivalents	(43,790)	29,516	25,133
Cash and cash equivalents at beginning of year	189,975	160,459	135,326
Cash and cash equivalents at end of year	146,185	189,975	160,459
Cash paid during the year for:
Interest	15,570	11,504	12,575
Income taxes, net of refunds received of $2.5 million, $2.1 million and $3.2 million	$ 49,842	$ 72,578	$ 35,273