Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Allowance for doubtful accounts	$ 80,591	$ 80,013
Contract asset, allowance for doubtful accounts	4,815	4,993
Accumulated depreciation on property, plant and equipment	1,156,824	1,158,451
Other assets, allowance for credit loss	$ 65,895	$ 66,864
Shareholders’ equity:
Common shares, par value (in dollars per share)	$ 1.25	$ 1.25
Common shares, shares authorized (in shares)	305,000	305,000
Common shares, shares issued (in shares)	176,793	176,793
Treasury shares (in shares)	45,620	45,885