Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended											12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Dec. 31, 2015	Oct. 03, 2015	Jul. 04, 2015	Apr. 04, 2015	Dec. 31, 2014	Sep. 28, 2013	Mar. 30, 2013	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income (loss) from continuing operations before taxes and noncontrolling interests [Abstract]
Domestic												$ (135,953)	$ (40,929)	$ (50,106)
Foreign												230,169	115,669	217,249
Income before taxes												94,216	74,740	167,143
Current income tax expense:
Federal												358	290	(27,031)
State and local												5	163	386
Foreign												46,999	63,573	60,282
Total current income tax expense												47,362	64,026	33,637
Deferred income tax expense:
Federal												6,163	78,933	7,999
State and local												(3,039)	311	204
Foreign												(5,643)	39,203	7,460
Total deferred income tax expense												(2,519)	118,447	15,663
Total income tax expense												44,843	182,473	49,300
Deferred tax assets:
Pension and other retiree obligations	$ 47,104				$ 40,322							47,104	40,322
Inventories	7,691				7,848							7,691	7,848
Net operating loss carryforwards	183,562				183,298							183,562	183,298
Tax credit carryforwards	25,432				23,512							25,432	23,512
Other accruals and reserves	29,401				35,176							29,401	35,176
Total gross deferred tax assets	293,190				290,156							293,190	290,156
Less valuation allowance	(165,269)				(167,932)							(165,269)	(167,932)
Deferred tax assets, net	127,921				122,224							127,921	122,224
Deferred tax liabilities:
Tax over book depreciation	(1,025)				(4,038)							(1,025)	(4,038)
Earnings not permanently reinvested	(139,165)				(162,667)							(139,165)	(162,667)
Convertible debentures	(203,641)				(188,978)							(203,641)	(188,978)
Other - net	(10,646)				(9,245)							(10,646)	(9,245)
Total gross deferred tax liabilities	(354,477)				(364,928)							(354,477)	(364,928)
Net deferred tax assets (liabilities)	(226,556)				(242,704)							(226,556)	(242,704)
Reconciliation of income tax expense at federal statutory rate to actual income tax provision [Abstract]
Tax at statutory rate												32,976	26,159	58,500
State income taxes, net of U.S. federal tax benefit												(1,972)	309	384
Effect of foreign operations												(26,551)	(13,212)	(27,372)
Tax on earnings not permanently reinvested												(3,553)	163,699	25,728
Unrecognized tax benefits												(8,453)	(1,353)	(21,603)
Change in valuation allowance on deferred tax asset												991	(8,888)	0
Foreign income taxable in the U.S.												18,442	7,025	13,499
Discrete Tax Items - Pension Settlement	34,853	$ 0	$ 0	$ 0	0	$ 0	$ 0	$ 0				34,853	0	0
Discrete Tax Items Repatriation	(165)	(1,402)	(1,217)	(769)	163,954	0	0	0				(3,553)	163,954	25,706
Tax effect of impairment charges												(454)	8,305	0
Tax effect of change in tax law									$ (1,228)
Tax effect of changes in valuation allowances	0	0	0	0	(8,888)	0	0	0
Tax effects of changes in uncertain tax positions	(8,704)	0	0	0	(2,629)	0	0	0				(8,704)	2,629	(25,706)
Other												(1,436)	429	164
Total income tax expense												44,843	182,473	49,300
Net operating loss carryforwards [Abstract]
Discrete Tax Items Included Income Tax Expense									(1,228)	$ (2,867)	$ (1,330)	22,596	152,437	(1,228)
Available tax credit carryforwards [Abstract]
Discrete Tax Items Repatriation	(165)	$ (1,402)	$ (1,217)	(769)	163,954	$ 0	$ 0	0				(3,553)	163,954	25,706
Expected repatriation													300,000	53,000
Income tax uncertainties [Abstract]
Cash repatriated during the current period												46,000	53,000
Foreign earnings without provision for US Tax	2,484,372											2,484,372
Net income taxes paid (refunded)												58,788	49,301	62,051
Company accrued interest and penalties related to the unrecognized tax benefits	1,638				3,887							1,638	3,887
Company recognized interest and penalties.												542	785	1,839
Unrecognized tax benefits [Roll Forward]
Balance at beginning of year				$ 23,527				$ 26,583				23,527	26,583	45,877
Addition based on tax positions related to the current year												1,553	1,439	1,641
Addition based on tax positions related to prior years												1,047	1,894	6,484
Currency translation adjustments												(96)	(1,370)	(1,387)
Reduction based on tax positions related to prior years												0	0	0
Reduction for settlements												(1,210)	(4,879)	(3,556)
Reduction for lapses of statute of limitation												(8,016)	(140)	(22,476)
Balance at end of year	16,805				$ 23,527				$ 26,583			16,805	23,527	$ 26,583
Current Year Earnings [Member]
Available tax credit carryforwards [Abstract]
Expected repatriation													20,000
Prior Year Earnings [Member]
Available tax credit carryforwards [Abstract]
Expected repatriation													$ 280,000
Minimum [Member]
Available tax credit carryforwards [Abstract]
Decrease in Unrecognized Tax Benefits is Reasonably Possible	57											57
Maximum [Member]
Available tax credit carryforwards [Abstract]
Decrease in Unrecognized Tax Benefits is Reasonably Possible	6,866											6,866
AUSTRIA [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	14,862											14,862
BELGIUM [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	150,327											150,327
BRAZIL [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	12,534											12,534
Germany [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	22,916											22,916
Israel [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	27,666											27,666
JAPAN [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	5,295											$ 5,295
JAPAN [Member] | Minimum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward												Dec. 31, 2018
JAPAN [Member] | Maximum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward												Dec. 31, 2025
NETHERLANDS [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	19,019											$ 19,019
NETHERLANDS [Member] | Minimum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward												Dec. 31, 2017
NETHERLANDS [Member] | Maximum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward												Dec. 31, 2025
The Republic of China (Taiwan) [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	9,019											$ 9,019
The Republic of China (Taiwan) [Member] | Minimum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward												Dec. 31, 2024
The Republic of China (Taiwan) [Member] | Maximum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward												Dec. 31, 2026
California [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	55,407											$ 55,407
California [Member] | Minimum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward												Dec. 31, 2020
California [Member] | Maximum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward												Dec. 31, 2036
Pennsylvania [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	721,824											$ 721,824
Pennsylvania [Member] | Minimum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward												Dec. 31, 2018
Pennsylvania [Member] | Maximum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward												Dec. 31, 2036
United States [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	90,247											$ 90,247
United States [Member] | Minimum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward												Dec. 31, 2033
United States [Member] | Maximum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward												Dec. 31, 2036
Research Tax Credit [Member] | California [Member]
Net operating loss carryforwards [Abstract]
Tax Credit Carryforward, Amount	12,353											$ 12,353
Available tax credit carryforwards [Abstract]
Tax Credit Carryforward	12,353											12,353
Research Tax Credit [Member] | United States [Member]
Net operating loss carryforwards [Abstract]
Tax Credit Carryforward, Amount	1,986											1,986
Available tax credit carryforwards [Abstract]
Tax Credit Carryforward	1,986											$ 1,986
Research Tax Credit [Member] | United States [Member] | Minimum [Member]
Net operating loss carryforwards [Abstract]
Expiration Date tax credit carryforward												Dec. 31, 2034
Research Tax Credit [Member] | United States [Member] | Maximum [Member]
Net operating loss carryforwards [Abstract]
Expiration Date tax credit carryforward												Dec. 31, 2036
U.S. Foreign Tax Credit [Member]
Net operating loss carryforwards [Abstract]
Tax Credit Carryforward, Amount	11,093											$ 11,093
Available tax credit carryforwards [Abstract]
Tax Credit Carryforward	$ 11,093											$ 11,093
U.S. Foreign Tax Credit [Member] | Minimum [Member]
Net operating loss carryforwards [Abstract]
Expiration Date tax credit carryforward												Dec. 31, 2020
U.S. Foreign Tax Credit [Member] | Maximum [Member]
Net operating loss carryforwards [Abstract]
Expiration Date tax credit carryforward												Dec. 31, 2022