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Restricted Cash, Deposits and Marketable Securities (Narrative) (Details) | 6 Months Ended
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Jun. 30, 2019
Disclosure of financial assets [line items] |
Bonds coupon rate | 4.435%
Bonds Maturity date | Dec. 30, 2020
Bonds rating | Baa3
WACHOVIA [Member] |
Disclosure of financial assets [line items] |
Annual interest rate | 5.80%

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