Supplemental Financial Statement Information (Selected Balance Sheet Information) (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Other assets:
Long-term investments	$ 204,876	$ 190,436	$ 250,240
Other	84,644	85,653
Total	289,520	276,089
Accounts payable and accrued liabilities:
Accounts payable	230,045	239,740
Customer deposits	272,251	255,892
Employee related liabilities	187,146	234,895
Other	155,936	143,099
Total	845,378	873,626
Other noncurrent liabilities:
Pension liabilities	94,414	105,766
Postretirement medical benefits	67,334	70,390
Other	42,136	38,870
Total	$ 203,884	$ 215,026