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Commitments and Contingent Liabilities - Unrecorded Unconditional Purchase Obligation (Details) - Purchase Commitment
$ in Thousands
Sep. 30, 2020
USD ($)
Unrecorded Unconditional Purchase Obligation [Line Items]  
Less than 1 year $ 242,786
1 - 3 years 429,062
3 - 5 years 369,444
More than 5 years 930,189
Total Purchase Obligations $ 1,971,481