Pension Benefits and Other Postretirement Benefits (Additional Information) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) plan	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Jul. 27, 2020 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of qualified noncontributory defined benefit plans | plan			1
Pension surplus investment balance	$ 5,902,000		$ 5,902,000		$ 5,278,000
Pension settlement charges	(534,000)	$ 0	(534,000)	$ (55,000)
Fair Value, Measurements, Recurring
Defined Benefit Plan Disclosure [Line Items]
Pension surplus investment	6,930,000		6,930,000		$ 9,106,000
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Pension settlement charges	0	0	0	63,000
Pension Benefits | Merged Plan
Defined Benefit Plan Disclosure [Line Items]
Pension surplus investment balance	9,700,000		9,700,000
Contributions	0			$ 0
Pension Benefits | Rogers Employee Savings and Investment Plan (RESIP) | Suspense Account Held Within a Trust
Defined Benefit Plan Disclosure [Line Items]
Plan assets						$ 7,400,000
Pension Benefits | Union Plan
Defined Benefit Plan Disclosure [Line Items]
Contributions		$ 0	0
Additional contributions required to make for remainder of fiscal year	$ 0		$ 0