Employee Benefit Plans - Schedule of plan assets by fair value hierarchy (Details) - Estimate of fair value - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of plan assets	$ 387,429	$ 383,725
Equity securities, Common/collective trust funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of plan assets	172,635	170,867
Fixed income, Common/collective trust funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of plan assets	212,012	210,226
Cash equivalents
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of plan assets	$ 2,782	$ 2,632