Pension and Retirement Plans - Components of Net Periodic Benefit Cost and Amounts Recognized in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Amounts recognized in other comprehensive income (loss)
Total recognized in other comprehensive income (loss)	$ (1,818)	$ (5,273)	$ 1,695
Pension Plan
Net periodic benefit cost
Interest cost	1,309	1,211
Expected return on assets	(3,876)	(3,566)
Amortization of prior service credit		(3)
Net periodic expense (benefit)	(2,567)	(2,358)
Amounts recognized in other comprehensive income (loss)
Net actuarial loss/(gain)	579	(4,723)
Amortization of prior service credit		3
Total recognized in other comprehensive income (loss)	579	(4,720)
Total recognized in net periodic expense (benefit) and other comprehensive income (loss)	(1,988)	(7,078)
Supplemental Retirement Plan
Net periodic benefit cost
Service cost	399	400
Interest cost	$ 260	$ 223
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Comprehensive Income (Loss), Net of Tax	Other Comprehensive Income (Loss), Net of Tax
Amortization of net actuarial loss	$ 28	$ 40
Net periodic expense (benefit)	687	663
Amounts recognized in other comprehensive income (loss)
Net actuarial loss/(gain)	(2,057)	(451)
Amortization of net actuarial loss	(28)	(40)
Total recognized in other comprehensive income (loss)	(2,085)	(491)
Total recognized in net periodic expense (benefit) and other comprehensive income (loss)	$ (1,398)	$ 172