Retirement Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Retirement Benefits [Abstract]
Service cost	$ 446	$ 617	$ 887	$ 1,250
Interest cost	714	519	1,423	1,042
Recognized net actuarial loss	123	267	246	534
Net periodic benefit cost	$ 1,283	$ 1,403	$ 2,556	$ 2,826