Pension Benefits and Other Postretirement Benefits (Additional Information) (Details)	6 Months Ended
	Jun. 30, 2021 USD ($) plan	Jun. 30, 2020 USD ($)	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	$ 5,694,000		$ 5,278,000
Pension Benefits | Merged Plan and Rogers Employee Savings and Investment Plan (RESIP)
Defined Benefit Plan Disclosure [Line Items]
Pension surplus investment balance	7,700,000
Pension Benefits | Merged Plan
Defined Benefit Plan Disclosure [Line Items]
Pension surplus investment balance	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