Commitments and Contingencies - Available Lines of Credit, Outstanding Standby Letter of Credits, and Bonds (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Oct. 18, 2019
Line of Credit Facility [Line Items]
Multicurrency revolving line of credit			$ 500,000
Net available for additional standby LOCs under sub-facility	$ 238,365	$ 244,010
Credit Facility [Member]
Line of Credit Facility [Line Items]
Multicurrency revolving line of credit	500,000	500,000
Letters of Credit Outstanding, Amount	(61,635)	(55,990)
Line of Credit Facility, Remaining Borrowing Capacity	238,400
Unsecured Multicurrency Revolving Lines of Credit [Member]
Line of Credit Facility [Line Items]
Multicurrency revolving line of credit	82,287	81,781
Letters of Credit Outstanding, Amount	(19,908)	(22,530)
Short-term borrowings	0	0
Line of Credit Facility, Remaining Borrowing Capacity	62,379	59,251
Surety Bond [Member]
Line of Credit Facility [Line Items]
Unsecured surety bonds in force	271,160	285,754
Line of Credit [Member]
Line of Credit Facility [Line Items]
Long-term Line of Credit	0	0
Line of Credit Facility, Remaining Borrowing Capacity	$ 438,365	$ 444,010