Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Allowance for doubtful accounts	$ 91,911,000	$ 79,059,000	$ 80,591,000	$ 80,013,000
Contract asset, allowance for doubtful accounts	4,577,000	3,404,000	$ 4,815,000	$ 4,993,000
Accumulated depreciation on property, plant and equipment	1,223,841	1,142,667
Other assets, allowance for credit loss	$ 65,830,000	$ 66,081,000
Shareholders’ equity:
Common shares, par value (in dollars per share)	$ 1.25
Common shares, shares authorized (in shares)	305,000
Common shares, shares issued (in shares)	176,793	176,793
Treasury shares (in shares)	46,233	45,688