Retirement Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Retirement Benefits [Abstract]
Service cost	$ 429	$ 603	$ 1,316	$ 1,853
Interest cost	705	516	2,128	1,559
Recognized net actuarial loss	124	267	370	801
Net periodic benefit cost	$ 1,258	$ 1,386	$ 3,814	$ 4,213