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Commitments and Contingencies (Schedule of Unconditional Purchase Obligations) (Details) - Inventories [Member]
$ in Thousands
Dec. 31, 2016
USD ($)
Unrecorded Unconditional Purchase Obligation [Line Items]  
2017 $ 122,965
2018 39,684
2019 38,426
2020 37,919
2021 23,515
Thereafter 97,301
Unrecorded Unconditional Purchase Obligation, Total $ 359,810