Components of Net Periodic Benefit Cost - Employer Contributions (Details) - USD ($)	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Amount of potential discretionary contributions accrued to a defined contribution plan	$ 1,700,000		$ 2,300,000
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Expected future benefit payment		$ 250,000
Contributions by employer	95,000
Pension Benefits | Employee stock option
Defined Benefit Plan Disclosure [Line Items]
Expected future benefit payment		703,000
Contributions by employer	0
Post-Retirement Health Benefits
Defined Benefit Plan Disclosure [Line Items]
Expected future benefit payment		$ 248,000
Contributions by employer	$ 171,000