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Commitments and Contingent Liabilities - Unrecorded Unconditional Purchase Obligation (Details) - Purchase Commitment
$ in Thousands
Jun. 30, 2019
USD ($)
Unrecorded Unconditional Purchase Obligation [Line Items]  
Less than 1 year $ 251,384
1 - 3 years 492,206
3 - 5 years 423,726
More than 5 years 1,159,534
Total Purchase Obligations $ 2,326,850