Summary of Significant Accounting Policies - Additional Information (Detail)			1 Months Ended			3 Months Ended		6 Months Ended
	Jul. 19, 2018 USD ($)	Jul. 05, 2011 patent	Mar. 31, 2018 USD ($)	Nov. 30, 2016 USD ($)	Jul. 31, 2015 patent	Jul. 01, 2018 USD ($)	Jul. 02, 2017 USD ($)	Jul. 01, 2018 USD ($) Segment	Jul. 02, 2017 USD ($)	Jan. 01, 2018 USD ($)	Dec. 31, 2017 USD ($)
Significant Accounting Policies [Line Items]
Number of global business platforms | Segment								2
Number of operating segments | Segment								2
Revenues						$ 668,639,000	$ 610,633,000	$ 1,274,204,000	$ 1,162,014,000
Net income						28,792,000	35,891,000	31,362,000	61,472,000
Increase (decrease) in retained earnings						814,071,000		814,071,000			$ 833,610,000
Other current assets						(48,779,000)		(48,779,000)			(40,167,000)
Other long-lived assets						(34,551,000)		(34,551,000)			(65,207,000)
Deferred income taxes						65,439,000		65,439,000			$ 42,549,000
Operating income						56,506,000	62,776,000	100,709,000	114,373,000
Accounting Standards Update 2014-09
Significant Accounting Policies [Line Items]
Revenues						0		(100,000)
Increase (decrease) in retained earnings										$ 2,600,000
Accounting Standards Update 2016-16
Significant Accounting Policies [Line Items]
Increase (decrease) in retained earnings										(31,700,000)
Other current assets										3,000,000
Other long-lived assets										46,900,000
Deferred income taxes										$ 18,200,000
Accounting Standards Update 2017-07
Significant Accounting Policies [Line Items]
Operating income							300,000		600,000
PPC | Corning
Significant Accounting Policies [Line Items]
Gain contingency, number of patents allegedly infringed upon | patent		2
Gain contingency, number of patents infringed upon | patent					2
Litigation settlement amount			$ 61,800,000	$ 61,300,000
PPC | Corning | Subsequent Event
Significant Accounting Policies [Line Items]
Proceeds from settlement	$ 62,100,000
Standby Letters of Credit
Significant Accounting Policies [Line Items]
Loss contingency, range of possible loss, portion not accrued						7,200,000		7,200,000
Bank Guaranties
Significant Accounting Policies [Line Items]
Loss contingency, range of possible loss, portion not accrued						2,400,000		2,400,000
Surety Bonds
Significant Accounting Policies [Line Items]
Loss contingency, range of possible loss, portion not accrued						$ 2,300,000		$ 2,300,000
Immaterial Overstatement In Prior Period
Significant Accounting Policies [Line Items]
Revenues							10,400,000		16,500,000
Net income							$ 1,300,000		$ 4,300,000