Goodwill and Intangible Assets Finite Lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 27, 2015	Dec. 28, 2014	Sep. 27, 2015
Finite-lived intangible assets
Gross Amount	$ 110,321		$ 112,116
Accumulated Amortization	(74,658)		(71,784)
Foreign currency translation adjustments	400
Amortization expense for identifiable intangible assets	4,300	$ 5,900
Estimated amortization expense
2016	10,827
2017	12,525
2018	5,843
2019	2,989
2020	2,418
Beyond	1,061
Total	$ 35,663
Non-compete agreements
Finite-lived intangible assets
Weighted-Average Remaining Life	10 months 24 days
Gross Amount	$ 811		819
Accumulated Amortization	$ (629)		(587)
Client relations
Finite-lived intangible assets
Weighted-Average Remaining Life	3 years 3 months 18 days
Gross Amount	$ 104,988		106,676
Accumulated Amortization	$ (70,224)		(67,726)
Backlog
Finite-lived intangible assets
Weighted-Average Remaining Life	3 months 18 days
Gross Amount	$ 2,093		2,115
Accumulated Amortization	$ (1,710)		(1,444)
Technology and trade names
Finite-lived intangible assets
Weighted-Average Remaining Life	1 year 3 months 18 days
Gross Amount	$ 2,429		2,506
Accumulated Amortization	$ (2,095)		$ (2,027)