Supplemental Financial Statement Information (Selected Balance Sheet Information) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other assets:
Long-term investments	$ 190,436	$ 250,240	$ 259,977
Other	85,653	90,813
Total	276,089	341,053
Accounts payable and accrued liabilities:
Accounts payable	239,740	273,604
Customer deposits	255,892	212,634
Employee related liabilities	234,895	232,047
Other	143,099	111,134
Total	873,626	829,419
Other noncurrent liabilities:
Pension liabilities	105,766	98,784
Postretirement medical benefits	70,390	83,222
Other	38,870	42,104
Total	$ 215,026	$ 224,110