Business Acquisition (Narrative) (Details) - USD ($)		3 Months Ended	6 Months Ended	12 Months Ended
	Jul. 05, 2016	Apr. 01, 2017	Apr. 01, 2017	Oct. 01, 2016
Business Acquisition [Line Items]
Operating loss		$ 3,491,000	$ 294,000
Acquired receivables, gross contractual amount	$ 21,726,000
Acquired receivables, estimated uncollectible	$ 841,000
Goodwill		369,224,000	$ 369,224,000	$ 369,700,000
Weighted Average Useful Life (in Years)			15 years	15 years 1 month 6 days
Pro forma tax rate			20.00%
Period increase pro forma weighted average shares outstanding, basic and diluted			4,179,000
PCB Group, Inc [Member]
Business Acquisition [Line Items]
Business acquisition, percentage	100.00%
Total purchase price consideration, net of cash acquired	$ 581,407,000
Escrow Deposit	43,500,000
Revenues		42,227,000	$ 87,458,000
Adjustment to inventory		0	7,724,000
Goodwill	343,242,000
Goodwill, expected tax deductible amount		0	0
Intangible assets	248,900,000
Interest expense, debt		7,656,000	$ 15,312,000
Technology [Member] | PCB Group, Inc [Member]
Business Acquisition [Line Items]
Intangible assets	35,300,000
Weighted Average Useful Life (in Years)			15 years
Customer Lists [Member]
Business Acquisition [Line Items]
Weighted Average Useful Life (in Years)			15 years 9 months 18 days	15 years 9 months 18 days
Customer Lists [Member] | PCB Group, Inc [Member]
Business Acquisition [Line Items]
Intangible assets	153,900,000
Weighted Average Useful Life (in Years)			16 years
Trademarks and trade names [Member]
Business Acquisition [Line Items]
Weighted Average Useful Life (in Years)			25 years 5 months	25 years 6 months
Trademarks and trade names [Member] | PCB Group, Inc [Member]
Business Acquisition [Line Items]
Intangible assets	58,500,000
Weighted Average Useful Life (in Years)			3 years
Leasehold Interest [Member] | PCB Group, Inc [Member]
Business Acquisition [Line Items]
Weighted Average Useful Life (in Years)			5 years 5 months
Trade Names [Member]
Business Acquisition [Line Items]
Indefinite lived asset		$ 57,500,000	$ 57,500,000
Line of Credit [Member] | PCB Group, Inc [Member]
Business Acquisition [Line Items]
Principal amount	$ 460,000,000