Commitments and Contingencies (Details) $ in Thousands, € in Millions				1 Months Ended				3 Months Ended		9 Months Ended		12 Months Ended	285 Months Ended
	Apr. 02, 2014 EUR (€)	Aug. 01, 2012 USD ($)	Jul. 05, 2011 affiliate	Jun. 30, 2017 USD ($)	Jan. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) Cases	Oct. 29, 2014 USD ($)	Sep. 29, 2017 USD ($) Defendants Cases	Sep. 30, 2016 USD ($)	Sep. 29, 2017 USD ($) Defendants Cases	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($) Cases	Sep. 29, 2017 USD ($) Defendants Cases
Loss Contingencies [Line Items]
Environmental-related accrued liabilities						$ 5,600		$ 4,800		$ 4,800		$ 5,600	$ 4,800
Period of being in asbestos litigation										29 years
Non-maritime cases against company | Cases								249		249			249
Number of cases proceed to verdict | Cases								0		0			0
Claims settled and dismissed, number | Cases												50,958
Pending claims, number | Cases						249						249
Damages sought, value										$ 404,000
Number of defendants | Defendants								50		50			50
Punitive damages, value										$ 251,000
Accrual related to maritime and non-maritime cases, gross amount										1,100		$ 4,400
Insurance recoveries related to lawsuits										100		400
Accrual related to maritime and non-maritime cases, net amount						$ 4,000		$ 1,000		1,000		4,000	$ 1,000
Aggregate settlement costs						9,800		10,500		10,500		9,800	10,500
Settlement costs										700	$ 100
Aggregate litigation expense, amount						27,100		28,100		28,100		27,100	28,100
Legal fees										1,000	800
Income tax expense (benefit)								6,800	$ (5,700)	32,300	$ 7,700
Minimum rental payments required under non-cancelable lease agreement for year 1								15,800		15,800			15,800
Minimum rental payments required under non-cancelable lease agreement for year 2								13,500		13,500			13,500
Minimum rental payments required under non-cancelable lease agreement for year 3								10,800		10,800			10,800
Minimum rental payments required under non-cancelable lease agreement for year 4								8,100		8,100			8,100
Minimum rental payments required under non-cancelable lease agreement for year 5								5,900		5,900			5,900
Minimum rental payments required under non-cancelable lease agreement thereafter								10,600		10,600			10,600
Letters of credit								26,800		26,800			26,800
Performance bonds								200,500		200,500			200,500
Other guarantees								$ 145,500		$ 145,500			$ 145,500
Europe
Loss Contingencies [Line Items]
Number of affiliates engaged in violations | affiliate			2
Parent
Loss Contingencies [Line Items]
Number of cases | Cases								2		2			2
Damages sought, value										$ 20,000
Silec
Loss Contingencies [Line Items]
Damages sought, value | €	€ 1.9
Period of participation in underground power cables businesses			10 months
SEC and DOJ
Loss Contingencies [Line Items]
Accrued liability						82,300		$ 30,900		30,900		$ 82,300	$ 30,900
SEC and DOJ | Investigation Related to Financial Restatements
Loss Contingencies [Line Items]
Disgorge estimated profits, incremental aggregate amount						$ 82,300
DOJ | Investigation Related to Financial Restatements
Loss Contingencies [Line Items]
Penalties					$ 20,500
SEC | Investigation Related to Financial Restatements
Loss Contingencies [Line Items]
Penalties				$ 18,500	$ 12,400
SEC | Investigation Related to Financial Restatements | Within 360 days of Date of Resolution
Loss Contingencies [Line Items]
Penalties										$ 30,900
Monetary Damages
Loss Contingencies [Line Items]
Pending claims, number | Cases								99		99			99
Number of cases | Cases								141		141			141
Allege Only Damages
Loss Contingencies [Line Items]
Number of cases | Cases								40		40			40
Amount per plaintiff								$ 794		$ 794			$ 794
Infractions Including Potential Interest and Penalties | Brazil
Loss Contingencies [Line Items]
Income tax expense (benefit)		$ 8,000
Summons to recover contested incentives							$ 8,000
Infractions Including Potential Interest and Penalties | Brazil | Minimum
Loss Contingencies [Line Items]
Range of possible loss								0		0			0
Infractions Including Potential Interest and Penalties | Brazil | Maximum
Loss Contingencies [Line Items]
Range of possible loss								$ 8,000		8,000			$ 8,000
Disputed Credits, Including Potential Interest and Penalties | Brazil
Loss Contingencies [Line Items]
Income tax expense (benefit)										$ 20,000
Asbestos Issue
Loss Contingencies [Line Items]
New claims filed, number | Cases										50		84
Claims settled and dismissed, number | Cases										100			51,058