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Financial Commitments (Future Minimum Rent Payments under Non-Cancelable Operating Leases) (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Financial Commitments [Abstract]  
2019 $ 14,039
2020 10,706
2021 7,464
2022 6,567
2023 5,587
Thereafter 11,662
Subtotal 56,025
Less - Sublease rental agreements (1,398)
Total $ 54,627